I have a minifigure and I am trying to determine it's value - I'd like to know whether it's worth holding on to it for longer, or if I would get a reasonable price for it now.
1Welcome to Bricks @Sarah1973, and glad to help! If you've found an answer helpful you can up-vote them and if it's answered your question sufficiently you can accept it with the tick ;)– Zhaph - Ben Duguid ♦Sep 12, 2018 at 23:49
At the moment (12/09/2018) there are a few other people offering that figure for sale on BrickLink, varying from £110 to £230 (actual asking prices are in various currencies listed on the results page).
More importantly however, is the Price Guide page - from there you can see that one figure apparently was bought this month for about £72, however in July one was purchased for around £108, while another was purchased for about £83.
From that, you could probably get a sale at around £100, but it might take a while to sell.
1You are making a good point, the minifig seems to be very valuable now. However, this does not answer the OP's much more important question regarding the development of the price. I can imagine that the value of this particular minifig will not decrease because it will never be re-released. But this is speculation, therefore no answer, just a comment. Sep 14, 2018 at 6:49
That is true, it's price is likely to increase due to increased rarity, but that will conversely reduce the number of people willing to pay the asking price... Sep 14, 2018 at 7:04