Are those ancient pre-CS versions of PS, or do you mean CS2, CS3 and CS5?
The problem with the CS versions is activation. The activation servers are no longer available for CS2 & 3, so they can't be installed from the CDs. Adobe made activation-free versions of the CS2 packages available for download on an open website, and they are still available from mirror sites. I suppose someone might be interested in acquiring your licence, but the CDs themselves aren't usable. For CS3 it was more complicated - the user had to exchange their original product keys for new ones and corresponding activation-free installers on another Adobe website, but this service is no longer available. Again, the CDs can't be used directly, and the licence would only be useful to someone who already has the activation-free installers and keys and (say) wants to run additional copies legitimately.
CS5 can still be installed and activated (for now), and there's certainly a market for the CDs if they come with a licence and it can be transferred to a buyer. It might get complicated if you only have an upgrade version of CS5 that depends on earlier licences, especially if it checks for an earlier installation that can't now be performed without one of the CS2 or 3 activation-free installers.
Ancient pre-CS versions don't require online activation, but they won't install or run on modern operating systems. They'd only be of interest to retro-computing enthusiasts. On a Mac, I don't think even the CS versions are compatible with the current OS.
I don't think LR before LR6 requires online activation, so LR 2, 3 & 4 might still be of interest to people who have cameras supported by these older versions. Full versions will be more attactive than upgrade versions.