Umbreon-GX

The cheapest copy on the market has been sitting at £83.90 for a week, so undercutting it should shift stock quickly—though that seller's flagged as LP, meaning a clean copy can command more. If you've got a Near Mint example, grading to PSA 10 is worth serious consideration: they're shifting at £460 median with 3 sales just this week, which is a 5.5× return on raw. The spread between the cheapest (£83.90) and median (£199.95) tells you there's real appetite for better condition on this card, and UK buyers clearly accept both PSA and ACE for it.

• NotableThe cheapest copy has sat unsold 7 days at £83.90. Undercut it to move first.
• NotablePSA 10 sells at 5.5× raw (£460 median) with 3 sales this week. Worth grading a clean copy.
• CautionThe cheapest copy (£83.90) is flagged: graded LP by the classifier. A clean copy can ask more.
• NotableUK buyers pay 337% over Cardmarket for this card (13 sellers).
• NotableUK buyers accept ACE for this card: 13 of 26 recent graded sales were ACE.
• Notable56% of the UK listings are played copies (9 of 16); a Near Mint copy is the scarce one.
• NotablePSA 10 sells about 2 times a week (4 sales in 14 days).
• NotableUK asks run from £83.90 to a £200 median; the cheapest is 58% under the middle.
• NotableThis card is 17.5% of the set's total value (£110).