I can't pinpoint it either, and I've had a hard time valuing them in the past.
I don't know, ever since I returned from my hiatus I kinda gave up on getting all the GftQ - which as a collector is a big deal - but they are too many, not all of them are my cup of tea and they are not going to be easy to get anyway.
Although I'd be willing to pay nice amounts of FPs for one, I'm not sure I want to trade my old sets (this is 7 years old!) for one item only. Specially considering there is so much other stuff (see the long list of TT sets) I also want, and I may not have anything else to offer.
FCs are different, cause at least they help me to keep up buying the new sets
