Heck, I dunno, but I would think that if I were looking for something and someone had it 4 years ago, I would certainly give it a shot to check to see if they were still working with them today. What's the harm in that?
That sort of thing with old ads DOES bring new members to this site, which are new potential customers for people selling here. Again, what's the harm in that?
As for the bumping issue, heck, I would think people would be glad that the classifieds are so active that it's actually an issue keeping YOUR ad on the front page. That sort of thing is what brings people looking to see what is new in the classifieds. Quite honestly, the BEST thing to do would be to just limit the number of ads any one person could post each day and stop bumping completely so only NEW ads would be posted more often. Do people REALLY want me to put in severe restrictions like that? Only to have half of the people like it and the other half hate it, as per usual around here?
Oh and as for the contacts and attempted contacts via replies to the ads themselves, I need to remind everyone that this is, in fact, a DISCUSSION forum. Even to the extent of being related to a classified ad. This, too brings, eyes into the classifieds section, and while those eyes are there, they likely tend to look around at other things. Including YOUR ads. That was one of the main reasons that I re-enabled replies to classifieds. A public vote was held on this change, and the reason you see it as it is now is because that voting block won out. I believe the discussion is still here in the Feedback Forum if anyone cares to recap that issue when it was being considered.