If it's a necked down 22Jet, why would it be called a 17-32?? I would think that it would be a 17-357 Jet or something like that to indicate parent brass and the Jet for the long sloping shoulder. Steve Herrett had a 17-44 but it was a straight walled case with a very sharp shoulder without all the slope. The eliminated the sticking problems with the "Jet" shape. He used it to shoot rockchucks on the putting greens of the Twin Falls, ID golf course in the early morning, before they opened to customers.
Might actually be a bargain based on the two I built. The firsst .17 I built was a new #1 in 223 and Shilen barreld it in the same taper match grade barrel as factory and the same 26" length. I shoot it at 4000 fps and that was after backing off from 4400 fps with the load that was listed as 4000 fps. The barrel is pretty slick and cleans easily. It also makes ito about a 10 pound rifle with the tiny hole down the barrel.
Later on I used a 243 "A" and built a lighter rifle for carrying around in 17 Mach IV. That one has a Douglas barrel that matches the "A" profile. Right at 3600 fps with a very moderate charge of IMR. That one predates the 17 Fireball. If I were going to build another to replace it I'd just make a 17 Fireball now that there is factory brass and dies for it. That would be my choice if I were build another as the Mach IV ad the Fireball or nearly identical and far fewer problems with brass etc with the factory Fireball.
If a guy wanr to have a LOT of fun this might be one heck of a bargain.
I already have #1s in 17 Remington, 17 Javalina (17-222) , 17-223 and of course the 17-221 with a 30 degree shoulder, the 17 Mach IV.
I do know a guy couldn't start from scratch, buy group G dies and form brass etc for this
price. It'd make a heck of a present to yourself. ;-)
RWT