I don't know if any of you remember "Paragon Sales", but they sent out pre-sale flyers to all FFL dealers back in the early 1990's, offering NEW Australian L1A1 rifles for $600. At the time, the L1A1's were selling for about $800 in "used" condition. I sent a check to Paragon for 2 rifles.
A couple of months later, Paragon sent back a refund, with a note that said that they had sold out. Oh, well!
At the next gun show that I went to, a vendor had a huge display of NEW Australian L1A1's, and they had the price tag of $1,300 on each. I happened to notice that one of the shipping boxes at that vendor's table had a shipping label on it, and it said "Paragon Sales". That vendor eventually copped out to having bought ALL of the L1A1's from Paragon! I asked him what his price would be to an FFL, and the jerk snidely grinned and said, "There's the price tag!" What a GOUGER!
If Big 5 swung a deal for a quantity of M-1 Garands, I can guarantee that you won't see them priced at $100! If there is ANY truth about those Israeli re-imports, there'll be some "back room" wheeling and dealing done....and you won't see them listed for only $100! You might not even see them at your local Big 5 store!