Gengar

UK sellers are asking between £37.96 and £55.00 for this Gengar, with the median sitting at £55.00—meaning the cheapest listing is 31% under the middle ground. If you're buying, the low end at £37.96 offers meaningful value; if you're selling, the wide spread suggests pricing power, though you'll need to shift quickly at the bottom or wait for the right buyer at the top.

• NotableUK asks run from £37.96 to a £55.00 median; the cheapest is 31% under the middle.