Sounds high to me also. I would think in the low 20s, especially with a V6. I'd see what the new ones are going for as they will start getting really aggressive to get the '17s off the lots to make room for the '18 models. The rebates and dealer incentives get really aggressive this time of year. Also see if some lot has a left over '16. My cousin got a 2 year left over Ram 3/4 a while back. Think they knocked 15k off the price. If you can find a deal you will be getting a 3yr factory warranty to boot.
As a side, where did CarMax get the truck? Trade in, auction, some one who sold it to them because they couldn't sell it themself? Is it a flood vehicle? When you buy used now days, you are taking a gamble as they can ship trucks all over the country where the natural disaster is not known about.
