Give me first dibs! What's your carb's part number?
If I recall correctly wasn't your 72 the nice one from a while back on ebay that was sold new here in NJ back in 72??
Seriously though, the Pontiac stuff like carbs, distributors, intakes etc., have gone crazy simply because the 72 model year was cut in half due to the UAW strike. But all the date code correct Pontiac stuff from the rare cars, especially the RAIV's and 455HO's are getting (have gotten) really expensive.
I cant stress it enough if your'e going to buy one of these Pontiacs make sure it's complete. Mine was 98% complete minus correct carb and distibutor and I paid $1000 for a restored, correct, original 1972 build-date, 4-speed 7042273 carb 2 years ago and $550 for the correct 1112126 distributor last year (it was the only one I've ever seen for sale)