I'm not one to shop on eBay all that often. I simply don't trust the market place. BUT every so often there are some great buys from reputable dealers.
Right now, Subterranean Press has some of their overstock / warehouse finds listed at below list price. So you may want to scoot over and check out their Subpress eBay store.
Books of note:
There are also many listed at or below $30, and just a few above the $100 level.
Labels: China Miéville, Dan Simmons, eBay, Hypermodern collectible, Limited edition, Ray Bradbury, sci-fi, science fiction, Signed editions, Subterranean Press