Carl,
A 28X,XXX Inland would have been built around 4- 1943, so the 2-43 barrel appears to go with the receiver. That is pretty early. Sounds like it's a normal import with rebuild upgrades. The W in the sling cut sounds like it could be Winchester. You mention a few other Winchester marked parts. If they are, you can surely trade them for Inland parts. It would be costly to try and restore to original with stock, rear sight, type 1 band, mag catch, safety, etc. But if it shoots good, does the shop owner have a range?
As Charlie mentioned, check for a rewelded receiver. But I don't see many of those. Pictures would help to see condition if you can get some.
I think for $600 it would be a good milsurps addition and would pick it up. They $700/800 in my area.
But it's easy for me to say, I'm a carbine junkie and it wouldn't put me on the couch.
Good luck,
Jim