I bought 2010 EE from a site on E Bay a few months ago for about $25.00 with shipping. It arrived in a week, new, usable serial#, and completely patchable. I don't think there's a 2010 that's NOT the EE, but be careful not to download the Steam Version. You can buy it from a few places online, or from NV3 themselves, but I was pleased with my purchase. If you would like more details, post back and I'll dig them up.
I can lend you my "Time Machine" if you want to "jump forward" to get TS2100... (I have an old telephone booth in my padded cell). It was left there by one of the doctors. I'm not sure "Who" the Dr was !!! :hehe: