The adapters in question are Sagem-branded Z-Com XG-703A adapters. They are sealed in anti-static bags and presumed to be new.

These adapters have the Intersil Cohiba chipset (ISL3887 + ISL3686). Linux support is well established with p54 (which will support Station, Ad-hoc, AP, Mesh, and Monitor [with injection] modes). The devices will also work with 32/64-bit Windows XP, Vista, and 7.

The price is set to at the equivalent of 10 USD in BTC (set at the highest MtGox ask price). If you are interested in multiple adapters, the total price will be reduced. Please send me a PM if you have any interest (though I certainly expect none).