Hi Neal,
From a financial perspective, I think now is a pretty good time, and I'm sure lots will agree, some records you can't put a price on now because there are buyers about that will pay good money and some for something they want that is hardly ever seen up for sale.
But it's not all about the money! Although one has to be able to afford to keep a collection if some items are worth a lot. As in, if you need something to live, it's silly sitting on a record (Although fully understandable of course)
I've thought about selling, but just can't do it (yet). I do so when I haven't played my records for a while because of being busy with other things (Family, work etc). I wonder if I would miss them after not playing them for (what seems) so long. Then one evening I whack on a tune, then another, then another....It then makes complete sense NOT TO SELL!
Hope that helps
All the best,
Len