I still have a crap load of Core 2 Duos running at my house and office. I have:
1 x q9650, 1 x q6700, 3 x q6600, 2 x e8400, 1 x e7400, 1 x e7300 and 1 x e4300 (I used to have more but have since sold them).
The e8400s, e7400, e7300 and two of the q6600s were CPUs I bought new back in 2008ish...