You'd be nuts to buy a commercial rifle when real Garands are to be had for $500. First the only way to get a WWII rifle that is original and pristine would mean you'd have to rob a museum or buy a time machine and join the Army circa 1942.
Every Garand you will buy has been either rebuilt, rebarreled, reparked, restocked, had the guts swapped a hundred times, etc. There are millions of them. Only a handful are real collectors items. No need to worry about ruining a war hero. Most likely if you got a WWII rifle the reciever is the only original part. There are rifles that are correct but they are rare. And there's no guarantee that they are "original". The Greeks returned a few NIB HRA's that are the only M1's known to exist in this state outside of a select few collectors. The CMP auctioned a couple that went $6k+ IIRC. But you can get a nice collector grade that is amlmost new and original for $1400 but it's 1950's vintage. I doubt you'd find a NIB or equivalent WWII M1 anywhere..