That's not a bad price for a quality rotor. Are they cross-drilled or slotted? I have a set of cross-drilled rotors on my Cadillac and they're great. Much more than a cosmetic difference. I bought them because I was warping standard rotors every 20k miles and I've had these for close to 35k now and no warping. You can see a picture of them here:
http://jadcock.oldsgmail.com/cadsls/rotors.html
There's also a link there to a road test an off-road magazine did with these rotors on a Trooper and they liked them. If those Brembos are drilled, that's a great price and I'd jump on it. If they're not drilled, I'd consider looking for a pair of drilled rotors for your truck. The outfit I bought mine from (at $120 ea) used OEM cores and drilled and radiused (not chamfered) them on a CNC machine, then gold cadmium coated them for durability. Indeed, there's not a shade of rust on mine, even after so long. Be sure to visit the link from the off-road magazine -- they've got lots of information there about the rotors.