Here is a great working SQ-80 bundled with the hard-to-find RAM cartridge for sale! Manufactured September 1988.
It has some cosmetic blemishes, as to be expected for a synth of this age. It could probably be cleaned up a little further still. The worst part is the slider cap is missing from the volume knob. Still, the volume slider works perfectly and is noise-free.
The RAM cartridge triples the amount of patches you can store and recall.
The battery in this SQ-80 has not been replaced. However, it does not affect performance or usage at all - it just shows the message during boot.
It is fully tested and working perfectly. All voices work perfectly, the screen is perfect.