“Good condition . Modded with aftertouch . Controls pitch . Separate aftertouch on /off for lead and poly section . Also sensitivity and bend range adjustable inside keyboard with trims , for each section which makes for very creative bending techniques. Sliders , switches all work , and have been cleaned . Sounds great . Sold as is . ”
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“2 Moog Realistic Concertmate MG-1. Condition is For parts or not working. What you see is what you get.”
“Excellent working condition Realistic Synthesizer by Moog Music.
“UP FOR AUCTION IS AN MOOG Realistic Concertmate MG-1 Radio Shack Analog Synthesizer
“This is a modified piece. View photos for more detail. I’ve attached labels to describe the mods as best as I know. They are a huge improvement for this synth. Overall condition is good. A couple keys have small chips. The foam that goes around the knobs and switches circuit board has been removed. The mixer section sliders sound a little dirty. It tends to pick up noise in the added knobs if the volume knob is set too low, but the sound is clean if the knob is set higher.”
“MOOG Concertmate MG-1 Realistic Synthesizer 42-4000.
“MOOG Concertmate MG-1 Realistic Synthesizer 42-4000. Condition is Used. Connected RCA outs to a receiver and it definitely works but not sure it works as it should. Don’t know how to work it so not sure what it should sound like. It did not sound like a keyboard and had lots of other noise. Please be aware it may have issues. ”
“Moog Music Model 42-4000 Concertmate MG-1 Realistic Synthesizer Condition is Used. “Sold As Is””
“MOOG Concertmate MG-1 Realistic Synthesizer 42-4000 in very good condition. All functions seemed to be working but I’m not a keyboard / synthesizer player. Two slider knobs missing and one silver cap on slider.”
“Moog Realistic Concertmate MG-1 synth – vintage analog synthesizer in very good condition, see pics. All keys work, all sliders and knobs work. I used it to trigger it from a Eurorack modular, so CV/Gate input works great as well, stays in tune nicely. Big, fat, warm old Moog sound I can’t seem to replicate exactly with my Sub Phatty, but I don’t need 2 bass synths now. I recently opened it up to clean the grimy foam off, and upon putting it back together the far right key went askew; not sure what happened there, but the key plays fine. There is a missing silver decal off of one of the slider caps”
“I had this tested & the salesman said it’s not quite right.
“Moog Music Model 42-4000 Concertmate MG-1 Realistic Synthesizer. Condition is Used. There is one small knob missing for the poly phony slider control (see pictures). Other than that this is on very good condition.”
“VINTAGE 1983 REALISTIC CONCERTMATE MG1 MADE BY MOOG
“Moog Music Realistic Concertmate MG-1 vintage analog synthesizer. Condition is Used.
“Foam is removed and overall good condition. There are very small chips in the front of 2 keys. See photos.
“WELCOME TO THE SALVATION ARMY AUCTION LISTINGS TODAY WE ARE LISTING A REALISTIC SYNTHESIZER BY MOOG MUSIC/ CONCERTMATE MG-1. THIS ITEM POWERS ON- DON’T KNOW IF THIS PRODUCT WORKS -HAS NOT BEEN TESTED- THAT IS WHY WE ARE SELLING IT FOR PARTS. PLEASE SEE ALL PHOTOS FOR SPECIFICS. ALL OF OUR ITEMS ARE DONATED BY VERY SPECIAL PEOPLE WHO WANT TO MAKE A CHANGE IN SOMEONES LIFE. THANK YOU FOR YOUR CONTINUING SUPPORT AND YOUR INTEREST IN THIS ITEM.” 
“REALISTIC Concertmate MG-1 Analog Synthesizer moog with original manual. Condition is Used. Plays as it should.” 
“Moog Music Model 42-4000 Concertmate MG-1 Realistic Synthesizer with mods. Condition is Used. Working perfectly.
“Vintage 1983 Realistic Concermate MG1 made by Moog.
“This synth has had a full service – every slider has been cleaned or replaced if needed, one of the MM5823N divider chips was replaced, a 2n3906 transistor was replaced in the first oscillator. Also, the synth received a full recap using high quality Nichicon electrolytic capacitors. I performed a couple standard mods and changed the RCA out to a normal 1/4” jack along with increasing the overall output volume. The nasty ass foam protecting the sliders has been cleaned off and replaced, along with new knobs and slider caps. All keys were removed and polished. This synth looks lovely and will sound beautiful for years to come. Cosmetically speaking, it looks pretty good overall and has a few cracks in the overlay, also a few flecks of what seems to be white paint. Other than that, it’s quite pretty for a synth this age.”
” only one key shows wear…works fine and the area is small…about the size of a dime, its fine but just sayin. Selling it for the going rate…and assuming it will go to Cali. we will rebate within 10 dollars of our cost..it will be packed well as we have done 30,000 listings. It has the manual. 4 switch/slide covers have been replaced, with no visual impact. A great new years present to yourself. Bah Humbug. lol Look what you do for others, dont forget yourself in this holiday season.”
“only one key shows wear…works fine and the area is small…about the size of a dime, its fine but just sayin. Selling it for the going rate…and assuming it will go to Cali. we will rebate within 10 dollars of our cost..it will be packed well as we have done 30,000 listings. It has the manual. 4 switch/slide covers have been replaced, with no visual impact. A great new years present to yourself. Bah Humbug. lol Look what you do for others, dont forget yourself in this holiday season.”
“You are bidding on a vintage REALISTIC RADIO SHACK TANDY MOOG SYNTHESIZER MODEL NO. 42-4000 CONCERTMATE (CONCERT MATE) MG-1 in very clean condition. The only damage I see is a repaired key which works fine and is shown in pics. Comes with a downloaded manual. There is no reserve. Payment is via Paypal. Buyer pays all shipping costs. Feel free to ask all the questions you want, but please ask them before you bid. Item is being sold “as is” with no returns. ”
“90% – Very Good Condition : Basically Clean, might have some deeper scratches, pick wear or missing finish. Nothing real serious, no cracks, or other flaws.” 
” Vintage Realistic Concertmate MG-1 Synthesizer by Moog. Licensed to Realistic by Moog Synthesizers, this is an incredible sounding vintage analog monophonic synth. In great condition and works great. Features two oscillators, noise and bell (ring modulator), a great modulation section and the legendary Moog filter. ”
“Everything has been tested and is 100% working. SOUNDS GREAT!!! Great piece of history for Radioshack, Realistic and Moog. Highly collectable.”
” My father brought this home new from Radio Shack as a gift for me in 1982.
” Vintage Realistic Concertmate MG-1 Synthesizer by Moog. Licensed to Realistic by Moog Synthesizers, this is an incredible sounding vintage analog monophonic synth. In great condition and works great. Features two oscillators, noise and bell (ring modulator), a great modulation section and the legendary Moog filter.” 
” Was told by original owner that it works, but he knows there are 2 dead keys. he attached the output cord on bottom. Selling as is – I do not have equipment to test.”
“This is a used Moog Realistic Concertmate MG-1 Analog Synthesizer. It is in fair cosmetic and good functional condition. Powers up, headphone jack works great, tones sound awesome and all the controls seem to work. One of the switches was replaced at some point (shown in the photos) and it is missing a rubber foot (easy to replace with anything). I never tested the RCA out jacks, but have no reason to suspect they are faulty. In light of its advanced age and awesomeness, I’m selling this as-is”
“Sounds great, good cosmetic condition.” 
” You are bidding on Moog Realistic MG-1 real vintage analog synthesizer. Item was sitting on a shelf for at least 10 years or so. When I picked one it was very dusty, I cleaned the synth outside and she looks very very nice. I tested the keyboard to my best and I can say she does work, makes good fat sound, sliders and switches function and actually unit is playable , you can make unison or some detune, get in right pitch etc, BUT the synth needs good cleaning. Some sliders kind of stiffed or react on sliding spontaneously, same about some switches, 2-3 keys needs contact cleaning . It was a lot of dust, so it needs cleaning inside. meanwhile as I said she is still in playable condition. Unit doesn’t have any rust at all, just it was dirty. As far as item needs some attention the synth goes AS IS, all sales final. A little bit work for skilled person and this synth will be working like new. See pictures” 
“Up for sale is a Moog Music Model 42-4000 Concertmate MG-1 Realistic Synthesizer with Case.
” This is a Classic as pictured with manual!”
” Moog Realistic Concertmate MG-1 vintage analog synthesizer. Condition is Used. Shipped with USPS First Class Package. ”