“The tone these have is just super cool. You can get close with modern synths but when you must have THAT sound only vintage will do. It’s hard to explain, but you know when you hear it. Cuts though a mix effortlessly, and can do so completely dry.
This one has the proper voltage (120v) for use in the US.
It’s in very nice vintage condition. Please take a close look at the pictures. The keybed is in great shape (no wonky keys). All the fader buttons are original. A really nice vintage synth that’s been taken care of.” Click here to visit listing on eBay
“Rare vintage analog synth. This was my dad’s and he bought it in Japan when it first came out and has taken great care of it. He’s recently passed on so it’s time for this guy to find a new home. The synth is an excellent working condition and comes with a hard case. ” 
“Some minor flaking off of the veneer on the sides but that just adds character.
” YAMAHA SK-15 vintage ANALOG string ORGAN synth ENSEMBLE excellent WORKING
“Working Condition – Fair
“In nice cosmetic shape. Functions mostly good. However, the 16′ footage on the strings and the poly synth is not working. The slider on the string section just adds more volume of 8′, and the footage control on the poly synth doesnt do anything. Sometimes when powering up the string section doesnt work, and it needs to be shut off again. Also smells kinda weird, haha. Pricing this with the intention that whoever buys it will need to get serviced.” 
“YAMAHA SK-15 vintage analog string organ synth. Sounds great and plays really well for the age.” 
“YAMAHA SK-15 vintage analog string organ synth arp solina Powers Up Parts Repair. Condition is For parts or not working. This unit is Untested you need to hook it up to a power speaker like amp or something it does power up and lights come on other then that unsure if it works this unit was made in Japan and is heavy ”
“This vintage synth was recently serviced and is in great working condition. Has a few signs of wear but in great shape (see photos).” 
” Up for sale is a vintage early 80’s Yamaha SK-15. The Yamaha Sk-15 is in excellent condition for a synthesizer over 30 years old. This Yamaha SK-15 produces many of the same sounds as the Arp Solina and was its competitor back in the days. Great for classic organ sounds and beautiful lush sounding ARP Solina strings. This item has been tested and is in great working condition. No sticky keys or buttons on this synth. All the sliders and buttons have have been gone over and cleaned producing no static whatsoever. If your looking for an original String/Organ from the 80’s this is it. Remember this item is over 30 years old and does have some light knicks and wear.”
“headphone jack used for test. sounds good. all voices sound. filter and resonance respond great. organ tones respond. all other functions untested. chip to one key. fully playable. sold as is. 4/5 cosmetic. ”