I'd definitely be in on one for $20. Not $2000 though. What's $20 from 1960 worth today?
Edit: after a quick google search it's about $200 today still a good deal on any gun.
$189.95 or 849.7%. The M1 Carbine sure beat inflation. People should have invested in Carbine futures in the mid-’60s…they would have done quite well.