<s>Seven inches and all man</s> I don't know, actually. *looks* 25, 25, 30, 80, 20, 200, 250... probably about 100 in tapes back in the day... two local cons and one sleepaway... about a hundred in cosplay commissions (I usually sell at a loss to friends)...
Doesn't matter, really. I've learned to buy things I know I'll enjoy - often by renting first - so I don't think I've wasted any money on it. Conversely, claiming you're a bigger fan just because you hemorrhage more money into something is um... well. Special.
I'm a picky buyer, so I don't think it's a good thing to grab anything you see. That just leaves you with a bunch of crap lying around that you never use, and that's not something I like.

('Course then, I live in a shoebox, so I have a different outlook on clutter.)