Sounds like a pretty good deal, I assume it's for a Contender? If so you'll need to handload for it, and keep the loads on the light side. A 444 is a pretty stiff round for a Contender, and most custom barrel makers recommend it for the G2 Contender only because of the beefier frame. If this barrel is for an Encore, there's no problem.
You cannot mention who did the rechamber, but I guess he does good work. I've bought a few replacement and tune-up parts, but never shot any of his reworked barrels.
The 2x Leupold scope is worth half or more of what the shop is asking for the barrel with the scope!