The blue one says Netgear - and it looks like an ethernet card, which would make sense for the brand. The green one doesn't look like it has external ports, so it has to be a controller card, like and IDE or SATA controller. The black thing appears to be a slot fan, usually mounted next to a video card to help keep it cool. The other parts are hard to make out. Probably drive rails or slot covers. Good luck on the auction!