And absolutely, bring on winter!
I just bought used 7950 from Amazon last week for $199 with free shipping and game coupon (which I will sell on ebay for $30).
http://www.amazon.com/gp/offer-listing/B007NG3WR2/ref=sr_1_1_olp?s=electronics&ie=UTF8&qid=1377110033&sr=1-1&keywords=7950+msi&condition=used
7950 is now the best GPU considering Hash/$ mining scrypt coins. My average return mining scypt is 3x of the BTC mining with the same card. Only 20% of my mined coins are going towards power bill (I pay $0.08 per kWh)
Am I doing something wrong buying 7950 now? Am I nuts?