I even bought one of those .22 SMLEs, I think long about 1964 or 1965. I don't remember if I thought it was expensive or not but I certainly didn't have a lot of money floating around. While they were still available through the mail, I also bought an FN-1949 in .30-06 and two more Lee-Enfields. The FN was expensive, even then. Ammunition was particularly expensive for anything, I thought, relative to what it was now.
The .22 Lee-Enfield was made in 1914 and looked to be that old, too. Some surplus guns could be had "select", same as now. I don't remember any other surplus .22s but there must have been some. I do recall seeing a lot of .22 Mossbergs in a store at one time but otherwise I never saw any surplus rifles in a department store. Potomac Arms used to be one of my regular Saturday morning stops until they closed a few years ago and they generally had a lot of surplus things. They still had dewats, too. The last one I saw there was a Madsen light machine gun.
Looking back at the advertisments in magazines in the early 1960s, you note the availability of a lot of what are now fairly rare guns sold as surplus, even including Lugers and .45 automatics, as well as some other more unusual military pistols. What you didn't see, however, were the ones being sold now or very recently, like Mosin-Nagants, SKS carbines, any kind of AK, or Makarovs. At the time, they weren't surplus yet, I suppose.
Surplus firearms come in waves. At one time Krags and Single Action Army revolvers were sold as surplus.
I think at my current discretionary spending level, I'd find an FN 1949 to be expensive at 1960 prices, which sold for just about one week's pay that my father was earning.