When eBay went to almost 10% in fees - (about 8% in listing and closing fees plus the near 3% in Paypal fees), I had a minor conniption fit and have been on a bit of a quiet ban of the site. Craigslist has become the classifieds of choice for most, and you can find just about anything there, including comics. There was a bit of the same kind of mentality I've been finding in garage sales - "It's old therefore it is valuable." But if you look around you can find some deals and if you employ the art of haggling, I bet you could even get a better deal. In this time of economic crisis, I hate to sound like a vulture, but you can get some screaming deals if you take the time to research lots and keep your eye on what gets listed. I usually find that the good deals don't last long, so be ready to strike.
The typical Caveat Emptor - Buyer Beware - applies here. Be careful taking lots of cash, inspect before you buy, don't rush into it, and be sure you let someone know you where you are going. Keep it safe and you could easily find some great items for your collection.