Vintage Yamaha PS-1 Mini Keyboard with Case

Description

Finally parting with some of my mini key collection. Not that I really want to, but turns out that during a pandemic, home repair costs skyrocket - who knew?
Yamaha PS-1 - the one that started it all. Good condition, fully functional. Tested with batteries and the included aftermarket AC adapter; the battery door is missing.  Normal wear-and-tear for a keyboard of this age. Still makes some interesting sounds, is very circuit-bendable, and is a little piece of history to boot.
Bit of technical info - the PS-3 is exactly the same as the PS-1, just a different color with a longer keyboard.
http://evilturtle.nl/projects/yamahaps3.html
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Unit has been tested but because it is a piece of vintage electronics is sold strictly as-is. Please ask any questions BEFORE placing a bid!
Will be packed extremely well & shipped USPS priority from 19401. I do have several other keyboards up right now and will VERY happily combine shipping - less for me to pack.
Thanks for looking!