Man, there's some lucky people here. When I stop by local swap meets and sales, it's almost always 90's Image stuff or bad 80s comics...and always at a bargain of a buck each!
A few months back, stopped by a Goodwill and someone donated what looked like 5-10 longeboxes of moderns (civil war, marvel, Valiant, etc.), but the store was selling them for a buck each still. Would have liked to see the guy dropping them off as I would have offered him at least $20-$40 just maininly as reading material since there wasn't anything key in there.
I did score four beat-up X-Men Essentials books and an Infinite Crisis Companion TPB for a a couple dollars a piece though.