Sogeking

This manga printing commands a premium — it's 90.9× the plain version at £8.59. Raw copies are actually moving at your listed price of £529.20, with two UK sales in the last 90 days, so you've got decent liquidity there. A PSA 10 is worth considerably more at £1,031 median, but the grading uplift is only 1.3×, which doesn't justify the cost unless you've got a genuinely flawless copy. The grade spread is brutal too — a PSA 10 pulls in 82.8× what a 9 does, so don't bother grading anything less than perfect.

• CautionPSA 10 barely beats raw here (1.3×). Don't pay to grade.
• CautionA PSA 10 is worth 82.8× a 9 (£1,031 vs £12.46); only grade a flawless copy.
• NotableThis manga printing is 90.9× the plain one (£781 vs £8.59).
• NotablePSA 10 median up 9.3% on the last crawl (£944 → £1,031).
• NotableRaw copies actually sell for £529 (2 UK sales in 90 days, latest £529 on 17 Sep).