Professor Birch's Observations
| ebay.fr | n=8 | £15.62 | +114% |
| ebay.nl | n=4 | £12.35 | +69% |
| ebay.co.uk | n=21 | £12.15 | +66% |
| ebay.de | n=36 | £10.93 | +50% |
| ebay.es | n=25 | £8.82 | +21% |
| ebay.it | n=12 | £8.81 | +21% |
| ebay.com | n=84 | £7.31 | — |
How is this value calculated?
Recency-weighted trimmed median of 26 NM sales (RAW; outliers trimmed against the median, newer sales weigh more, dynamic half-life).
| Evidence path | Sales | Age | Value vᵢ | Weight gᵢ |
|---|---|---|---|---|
| eigene rohe NM-Verkäufe | 26 | 13 d | £15.69 | 212.24 |
| eigene LP-Verkäufe ÷ 0.9292 | 35 | 9 d | £18.75 | 3.06 |
| eigene PSA8-Verkäufe ÷ 2.1175 | 2 | 16 d | £14.75 | 2.73 |
| eigene PSA9-Verkäufe ÷ 7.1127 | 3 | 4 mo | £4.96 | 1.9 |
| de roh NM × 0.6889 (Sprach-Faktor aus 33 Karten) | 3 | 10 d | £6.31 | 2.43 |
Measured error for this era×language (backtest): ±19 %
| Evidence path | Sales | Age | Value vᵢ | Weight gᵢ |
|---|---|---|---|---|
| eigene rohe NM-Verkäufe | 3 | 10 d | £9.16 | 24.49 |
| en roh NM × 1.4515 (Sprach-Faktor aus 33 Karten) | 26 | 13 d | £22.77 | 2.45 |
Measured error for this era×language (backtest): ±43 %
Gate not green — shown only here, never as the price.
| Evidence path | Sales | Age | Value vᵢ | Weight gᵢ |
|---|---|---|---|---|
| en roh NM × 1.2403 (Sprach-Faktor aus 19 Karten) | 26 | 13 d | £19.46 | 2.36 |
Measured error for this era×language (backtest): ±12 %
Gate not green — shown only here, never as the price.
| Evidence path | Sales | Age | Value vᵢ | Weight gᵢ |
|---|---|---|---|---|
| en roh NM × 1.0872 (Sprach-Faktor aus 35 Karten) | 26 | 13 d | £17.06 | 13.44 |
| de roh NM × 0.7849 (Sprach-Faktor aus 13 Karten) | 3 | 10 d | £7.19 | 2.14 |
Measured error for this era×language (backtest): ±14 %
Gate not green — shown only here, never as the price.
No PSA numbers for this print yet — in any language.
Frequently asked questions
Auction or Buy It Now — which gets more for Professor Birch's Observations Primal Clash 159/160?
Across 16 auctions the median was £5.31, across 88 fixed-price sales £8.83. Fixed price therefore fetched about 66 % more — for this card patience with a set price is the better route.
What will I get for Professor Birch's Observations Primal Clash 159/160 if I want to sell quickly?
Half of all sales fell between £6.31 and £12.15, with a median of £8.56. Selling fast lands you nearer the lower end; with patience, good photos and a complete title the upper end is achievable.
Below which price is an offer for Professor Birch's Observations Primal Clash 159/160 unrealistic?
The cheapest genuine sales were around £4.84. Offers well below £2.90 are typically fakes, mislabelled cards or a different variant — ask for photos of all four borders and a close-up of the surface.
How does lastsold determine the market value?
lastsold uses only real sales — eBay plus auction houses like Goldin & Fanatics — recent sales count more (recency weighting), outliers and fakes are removed. It's not an estimate but actual sold prices, separated by condition, language and grading.