I'm pretty sure Tim is right when he says many sellers operate on a 'No news is good news' basis. But frankly, I don't want dealers 'phoning me up to ask if I am satisfied with my latest purchase anyway. If I am dissatisfied with any purchase I will contact the vendor myself and tell him/her that I am not satisfied.
In like manner I usually let the vendor know if I am delighted by a purchase.
I can't believe it is an accident that selling films is not the main occupation of the few remaining vendors. I can't for the life of me see how anyone could make a living selling films as a sole occupation in this day and age. They probably haven't got the time or the resource to contact buyers as an 'after sales' exercise.
Something one vendor said as an aside on my last visit troubled me somewhat. He was bemoaning the fact that 'quality', sought after titles by and large only find their way on to the market when a collector either sells up his/her collection or dies. And of course, anyone buying the collection has to put serious money 'up-front' and has to take the rough with the smooth. For every desirable title in the collection there will no doubt be many 'B' titles that no-one has heard of and no-one wants. And only a fool would sell off the desirable titles only to be left with the obscure stuff. Profits are marginal.
I am no expert, but I imagine Judging the true worth of a collection must be difficult. And I suppose in a way all that we are doing now is passing around the last of the existing films among ourselves. Very little brand-new stuff is fed in to the market as far as I can tell. And the existing stuff is getting ever older.
It won't have escaped the notice of anyone who regularly scans the web lists of those vendors that actually produce lists, that some titles haven't shifted in years. And they are unlikely to shift. Dead stock, not earning money.
I am reluctant to criticise true vendors, because without them I would have great difficulty trying to track down the titles I like and want. They have contacts and are willing to take risks. And the ones I deal with are people of integrity. They haven't sold me short yet, and I have no reason to suspect that they ever will.
What does worry me is, If we don't support them then in the words of L. Frank Baum, "soon, there will be no-one left who remembers Oz".