ya just have to learn when to buy when prices are low at funcoland. Like when genesis was less than 10 dollars, now it's around 30. Also go around to grage sales and open marts and buy up all the rare stuff for dirt cheap, trade it in at a premium, and go back to step one, spend the credit when prices are low.
Goodwill in my area has been a huge rip-off recently, charging $325 bucks for an Apple computer from the 80's!!!!! lol. I knew Mac's were expensive but come on!