24 cores plus all the other stuff for 700 bucks i think is a decent price. Are you going to fold with ubuntu or windows? I think windows ultimate only see's 2 sockets IIRC. Ubuntu will require a little more work to setup, but will get you more PPD with the big wu's. There is a good guide over at
[H] for the setup. Its easy once you get it running. 24 threads should get you 120-150 thousand PPD roughly with Big WU.
700 bucks for 120-150k PPD is a good value, with maybe 400W power draw.