Backwards/forwards compatibility is worse these days than say 6 or 7 years ago: time was loads more stuff worked with loads more stuff and all you seemed to worry about was steerer length.
I agree with sentiment. The second-hand market has more factors to consider.
I recently sold a Cotic Hemlock with a straight 1 1/8″ steerer. I tried it on STW for a week at what I thought was a reasonable price. Got some interest, but no-one bought it. I felt the price was ok, but the steerer tube was maybe the issue with potential buyers looking around for forks to fit.
I gave up on STW and put it on eBay with a BIN price £30 more than it had been advertised on STW. I sold it within 24hr.
Price is a factor, but getting enough people to see your ad is up there. eBay has it’s problems, but it can also be useful.