I was nervous to order anything from Abebooks because of all the bad reviews I've read, but I decided to take a chance. I ordered from Silver Arch Books and had no problems at all. My order got here in less than a week, and the books were in the condition as described. The only weird thing that happened was it said my order was coming from St. Louis, MO but my order was shipped from the Chicago area.
The prices are great, and the free shipping was nice.
I will probably order from them again in the future.