Just off the top of my head... I'd say a good price would be near $500 + - and obviously would depend on the over all condition and how complete. Maybe up to $1,000 if really nice.
But that again depends on how bad some one may need it, then it could be worth a lot! Start checking how much individual parts like the fenders etc. are going for to get a better idea.
I just drove past a body shop yesterday with a complete mint 69 Camaro front clip... but I'd imagine they were working on the rest of the car too?