I think Richie C's. comments are right on.
My future lay-out is timed 1955 in the wheat belt (central) part of the U.S. It seems as though all my towns people most of been very affluent after the war, I find very few pre 50,s vehicles on the low cost side ($10 or less). The majority are also convertibles. Like someone said on, I think another Thread, there was a time we could leave our doors unlocked if you just want them parked on the lay-out.
I too have a set of matchbox cars of yesterday but they are all classics, which I thought of having a classic car rally or populate a Drive-In Theater with them and have a classic car show (a reason to have cars in the Drive-In in the day time and not to be noticed as classics during the nighttime movie showing).
Also scale is questionable I have several duplicated cars 1/43 scale and the difference is like traditional vs. scale with our trains.
My two cents
Redball342