I've dealt with "iHobb" (Internet Hobby Supply) for many years, and they are excellent. Prices are reasonable and shipping is prompt. I've never visited their shop since I don't live in the area, but I've always been very happy with my dealings with them.

To the person who waited at their shop in hopes of selling their collection: Set up an appointment and don't assume you can just drop in and find the owner. It's also never a good idea to assume that a stamp dealer will buy your collection, especially if it's modest and not re-saleable by them. If you wasted your time, consider the mistakes you made.

Don't go here! My experience was horrible. When I called they said the owner went to lunch between 11:30 and 1. I got there at 1:15 and was told he just went to lunch. So I waited for an hour. Finally he got there, looked at my collection for about 30 seconds and said he was not interested. Wasted my time. No wonder there are no reviews.