My girlfriend was out shopping yard sales and came across a very clean, perfectly working SL-1500.
She texted me some photos, and it looks very clean, even the dust cover. It has an unknown cartridge of unknown age.
I had her buy it. I can't wait to get home from work and check it out. I'll probably just end up selling it, but I'm still looking forward to play-time.
The same seller had some Cisco routers and switches I may go back for. I need to build a lab to study for my CCIE.
EDIT: Forgot to mention the price. $50 bucks.