Cyclizar

The market's warning you off grading—PSA 10s haven't shifted in a fortnight despite sitting at £78.84, while raw copies move easily at £4.40, so don't waste money on the slab unless it's genuinely flawless. The jump from a 9 to a 10 is steep at 3.5× (£22.42 to £78.84), but that premium only matters if you can actually sell it. UK asks are scattered from £4.40 right up to a £7.50 median, so the cheapest listing is running 41% below the middle—worth shopping around before you commit.

• CautionPSA 10 hasn't sold in two weeks. Don't pay to grade.
• CautionA PSA 10 is worth 3.5× a 9 (£78.84 vs £22.42); only grade a flawless copy.
• NotableUK asks run from £4.40 to a £7.50 median; the cheapest is 41% under the middle.