I just wanted to recommend an online store that I've had good experiences with. No, it is not my store, but I have met the owner and bought records from him in person in addition to buying online over a period of several years.
I honestly can't remember if I posted about Boxer before, but they're a good store that carries a nice mix of things other stores don't. For example, there aren't too many places I can think of where you can buy vinyl from Sun Ra, Dischord Reissues, and Asmus Tietchens all in one place at his prices.
Packing and service are top notch and prices are fair. FYI I believe most of his listings are set up so that shipping is included for U.S. Customers.
You can check out the store here:
http://stores.ebay.com/Boxer-Records