With the 3870s and the 4850s so closely matching in price, suddenly buying a second 3870 doesn't seem like such a good idea. You can buy a 3870 for under $140.00 and have two 3870s in Crossfire (or a 3870 and a 3850 in CrossfireX depending on what you did back in the day). Alternatively, you can sell your 3870 and probably pull in a solid $90, and then buy a 4850, netting $100 and saving yourself the electricity bill of having two cards at the same time. Naturally, we have a problem with using just one card when we could so easily have two, but it really is the performance that counts.