Don't know if this is same company.
Very Low Price. Few Reviews (that's why I'm writing this one). Took a chance.
Ordered "Windows Internals 5th Ed." used condition hard cover on Feb 22 2010 @ 7PM CST to be shipped priority mail (USPS). Received email shipment confirmation with USPS tracking # on Feb 23 2010 8:23PM. Received physical package Feb 25 2010 1:36PM. I think their physical site is on the East coast. I'm located in Houston, TX.
The book's condition is almost perfect externally and internally. Looks like it sat on someone's shelf and they never opened it.
FYI: I also ordered a book from a1books.com, but not via Priority mail, so I'm waiting to give a verdict on them. They appear to be the middlemen between u and a seller. The seller is also located in TX, hence normal mail choice.