If you can get a full cage, tied into the frame with seat mounts, with DOM, made, installed, and painted for $300-$350, then jump on it.
Maybe someone who buys tube by the truckload and does cages all the time could bust it out in half the time & cost, but I tend to think $600 is pretty fair.
I was talking just cost of the tube...he's charging double what the tube cost...
I'm not saying $600-$700 is not a bad deal...not at all...it's just not a "free" cage, only paying for tube...
BTW...your tires sure fit nicely into the bed of my D350 this morning...
I'll send Slade the bill for the fuel surcharge...