30 days return. Buyer pays for return shipping. If you use an eBay shipping label, it will be deducted from your refund amount. Policy depends on shipping service.
This card was recognized without having to install any drivers by a fresh install of ESXi 7 in an HP Proliant DL360p Gen 8 server, and it connects to my HP P2000 G3 and MSA 2040 without any issues.