Back in the 1960s the Civilian Marksmanship Program offered tens of thousands of surplus arms to NRA members. M1 Carbines at $20 each. M1911-series .45 pistols at $25 each. Other odds and ends coming in from various National Guard armories included 1898 Krag rifles and a few Trapdoor Springfield rifles. The US Postal Service had a big inventory of US M1917 .45 revolvers (Colt and S&W) carried by the Postal Police from the 1930s to 1950s, then returned to military depots as surplus.
Every issue of Guns & Ammo or other such magazines had full-page advertisements for every possible variation of WW1 and WW2 surplus weapons from all over the world, all at chump change prices. Lee-Enfields, Mausers, Lugers, Lahtis, Astras, S&W Victory models, Colt Commandos, you name it and you could find it.
My days were spent in high school from 8AM to 2PM. My nights were spent on the night shift 10PM to 7AM at a service station, making 85 cents per hour plus a little extra on my labor charges (fix a flat tire for $2, I got a buck. Other crappy little jobs the day shift mechanics didn't want to do were left for the kid on the night shift). Six nights per week (54 hours), take-home pay was usually about $45, minus any gasoline charges. Mom was recovering from multiple surgeries, couldn't work for a couple of years, so my brother and I had to take care of the rent, utilities, groceries, etc.
Not much left over for guns and fun stuff. Then came the notice in the mail from the Selective Service Board, I transitioned from $45 per week to $94 per month (plus room, board, uniforms, equipment, ammunition, and free medical care that came in handy a few times).