Xeon Phi

So I was wondering, why is it that a 68-core Xeon phi, one that was thousands upon release, less than 100 bucks today (on eBay)? What about the 64 core Xeon platinums that show up often for under 100? Also, why are the boards $350+? That seems expensive for a board with a single socket, and you...

Will this GPU fit into a Dell Inspiron 570? http://www.amazon.com/gp/product/B00KJGYOBQ?keywords=video%20card&qid=1454609659&ref_=sr_1_3&s=pc&sr=1-3

Hello, I am really interested in animation and modeling/creating characters, in-game weapons, maps, and everything along those lines. I'm fairly young (19) and I've always been interested in this kind of stuff but never knew where to start since my school doesn't offer any classes along these...