Garand isn't restricted or prohib, doesn't need to be registered. Grab it!
If it really is an International Harvester as he claims, definitely grab it. Their barrels, subcontracted to Line Material Corp., were regarded as the most accurate and of the highest quality.
You can tell by the serial number if it's really an International Harvester. The serial number ranges assigned to International Harvester were 4,400,000–4,660,000 and 5,000,501–5,278,245. Most of the receivers were made by Springfield Armoury, but a small quantity, approximately 4,000, was supplied by Harrington & Richardson. Those receivers fall into the approximate 5,213,034 to 5,217,065 serial number range. The barrels were marked “LMR” on the right side and were stamped with the drawing number (“D653448”), month and year of production, heat lot identification, “P” (proof) and “M” (magnetic particle inspection). Except for very early examples, the barrels made under subcontract for International Harvester can be identified by a punch mark between the “LMR” and the drawing number.
Also, the protective ears of the barleycorn front sights made by IHC are wider than those made by Springfield, Winchester or H&R.
IHC made less than 400,000 rifles, so they're rarer and more valuable than other makes.