DLRP PTN Pins
It would be the main 3 of tink, jiminy and stitch that are the hardest to get and I ended up looking at the wants on stitch and its passed 400 now, earlier in the year it was only around 325 so its jumped by 100 at least so getting harder to find. There are a select few stand alone ones that could prove tough like scrooge, jessica and few princesses but the majority of the later ones could be found for around $40.
Trading wise, I couldnt but an estimate on what you would need to offer for any of the big 3 as that would have to be some offer for anyone to accept it and looking at the wants on Tink and Stitch then around $300+ if you were looking to buy them, Jiminy would be the weaker of the big 3 in my opinion since the wants on him has not increased but the Tink and stitch has increased by 100ish in a few months so maybe warrant a higher price now.