The offered modules are double-sided, OEM, and brand new (not used or refurbished) with 2 years warranty. There is NO motherboard-chipset known, with whom the modules do not work. Only TT in advance can be accepted. Also bank drafts can not be accepted because of a lot of scammers around the world. Samples available but only by TT in advance. Sample costs: USD 56.00. The modules will be sent through DHL within 3 working days after receiving TT.