I bought two pairs of JBL L200's for 500 a pair brand new in 1973-1974.
I tried to get a pair of well used ones off ebay for reasons of nostalgia and efficiency and curiosity of how they would mate with a cj tube amp) a few years back and gave up after eight hundred bucks gets trampled in no time.
Wish to god I had kept a pair, apparently, I am not the only one.
Buy what you like, forget about resale and have fun.