Welcome back and your screen name is familiar to me
A lot has happened in your life
I think it is quite common for things to change and people to move away from ponies, then come back again. I have seen this quite a bit over the years.
If you love your ponies and they are special to you don't part with them
IMHO nice ponies are getting harder to find and so more expensive. There is also the chance you might not be able to buy back anything you do sell, especially if it has some rarity to it.
The market has changed A LOT, things have gone quite crazy with prices (for example some of the Greeks have dropped in value dramatically, while the Argies have sky rocketed) In around 2009 or so people were liquidating their collections due to the recession and the market was some what flooded and prices became unstable.
With the advent of collecting groups on Facebook, Instagram and such makes it hard to gauge what ponies are selling for, due to groups being private and many sales being done between individuals, rather than openly in an auctions. Doing a PC used to be pretty easy, I could search sales here and on eBay, now it is trickier, but I do my best.
Love pkw xxx