I'm definitely slowing down on the palitoy 12 and 20bks - they are far, far more common than was thought even a year ago. A set can be completed pretty easily now so it makes no sense that they carry the huge premium they do at the moment. I could have completed at least 2 full sets of 12 this year, excluding vectis. A few years ago that would have been almost impossible - now there are CASES at auction.
I think there may be a few unhappy sellers in the future (I have definitely overpaid for 1 or 2 of mine so far). The people paying top money for c3po, sand people, storm trooper, r2 and dsc will struggle to get their money back Imo.
There are a few bits I will still pay high for, but yesterday at vectis I drew a blank despite setting myself a decent budget as most items simply weren't worth that much to me - and that spidey-sense usually serves me well. I see next year being interesting.