panzersargent,
Re Garands.... You are mistaken in who actually made M1 rifles.... Smith Corona and IBM were makers of the M1 Carbine and the '03 Springfield rifle.
The US Army's Springfiedl Armory made approx. 4 million M1's from the beginning of production in 1937 all the way to the end in 1957.
Winchester made approx. 1/2 million during WWII.
International Harvester Corp. and Harrington & Richardson each made approx. 1/2 million during the early 1950's.
There were NO other makers of the M1 rifle in the USA. Total production, all US makers, approx. 5.5 million rifles.
All of the M1 rifles, regardless of maker, are as reliable as any other..... i.e... GOOD.
Re collectibility... Any rifle that is truly ALL ORIGINAL to the date of manufacture is going to be collectible, with a VERY high price attached when compared to the run'o' the mill shooter grade rifle. The VAST MAJORITY of M1's however, have been through one or several armory rebuilds in which they may have received a new barrel, new wood, and replacement internal parts.... i.e. little or no collectibility regardless of manufacturer.
In general, Winchesters are sought after purely for the "Winny" name on the receiver heel. H&R's have a rep for very fine metal finish work. IHC's are harder to find and command a slight premium purely because of rarity. Rifles with barrerls made by LMR Corp (mostly IHC's and H&R's) have a rep for good accuracy, as do those with SA armory replacement barrels made in the mid 60's. Winchesters have a rep for extremely cruddy finish machining on the receiver and other metal (not all are this way, but enough to prove and perpetuate the reputation). Winny's also have rep for slightly less than stellar accuracy (with original Winny barrel). SA's have a rep for being all around well made, decent metal finish, and good accuracy.
Hope this helps....
Best regards,
Swampy
Garands forever