Amazingly my discovery of a ten dollar NES a few years back started my on my classic system kick... picking up old systems I used to have on the cheap... Picked up A zelda and original FF for 2 bucks apiece once... got my Genny there too for 10 as well... most of the time there is nothing, I havent shopped there in years... some of the people scare me 
The best find was an old Atari 2600 and games somebody donated... and they really took care of it... but the asking price was ridiculous so I passed
The best find was an old Atari 2600 and games somebody donated... and they really took care of it... but the asking price was ridiculous so I passed