The 105 parts should bring at least $250. Given the condition of that frame, you are best served parting it out. Wheelset and 105 parts will bring more than what the bike would sell for complete, probably quite a bit more. Buyers will have a tough time looking past the rust. Those that can will expect to get a hefty discount. Then sell the frame as a project, someone will want it. Or if you want to mess around with it, read up on oxalic acid and go for it.