Overview
- An Essex seller listed a Queen Elizabeth II polymer £20 with low serial AC90 000069 on eBay for £20,086.70, showing five‑figure asking prices for standout numbers.
- A circulated £10 featuring a small purple ink spot under the “Ten Pounds” text and the repeating serial DE10 300300 sold on eBay for £42.30, which is more than four times face value.
- Collectors often prize low serials, neat repeats and palindromes, and memorable runs such as 007, 666 or the ‘AK47’ prefix, and first‑batch AA01 notes have sold for thousands at auction.
- Queen Elizabeth II polymer notes remain legal tender alongside new King Charles III designs, so unusual serials can still appear in everyday change.
- A coin dealer urged caution, saying most modern circulating notes and coins are worth only their face value and that the market is driven by hobby interest rather than investment.