Professor's Research
| ebay.es | n=10 | $2.21 | +77% |
| ebay.de | n=7 | $1.77 | +42% |
| ebay.com | n=47 | $1.35 | +9% |
| ebay.co.uk | n=2 | $1.25 | — |
How is this value calculated?
Recency-weighted trimmed median of 14 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 | 14 | 22 d | $0.98 | 114.29 |
Measured error for this era×language (backtest): ±16 %
| Evidence path | Sales | Age | Value vᵢ | Weight gᵢ |
|---|---|---|---|---|
| en roh NM × 0.8851 (Sprach-Faktor aus 74 Karten) | 14 | 22 d | $0.87 | 2.17 |
Measured error for this era×language (backtest): ±19 %
| Evidence path | Sales | Age | Value vᵢ | Weight gᵢ |
|---|---|---|---|---|
| en roh NM × 1.1488 (Sprach-Faktor aus 63 Karten) | 14 | 22 d | $1.13 | 1.4 |
Measured error for this era×language (backtest): ±25 %
Gate not green — shown only here, never as the price.
| Evidence path | Sales | Age | Value vᵢ | Weight gᵢ |
|---|---|---|---|---|
| en roh NM × 1.2267 (Sprach-Faktor aus 47 Karten) | 14 | 22 d | $1.21 | 4.63 |
Measured error for this era×language (backtest): ±17 %
No PSA numbers for this print yet — in any language.
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Frequently asked questions
Auction or Buy It Now — which gets more for Professor's Research Scarlet & Violet 190/198?
Across 8 auctions the median was $0.63, across 30 fixed-price sales $1.54. Fixed price therefore fetched about 146 % more — for this card patience with a set price is the better route.
What will I get for Professor's Research Scarlet & Violet 190/198 if I want to sell quickly?
Half of all sales fell between $1.03 and $2.07, with a median of $1.56. 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's Research Scarlet & Violet 190/198 unrealistic?
The cheapest genuine sales were around $0.68. Offers well below $0.41 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 Last Sold determine the market value?
Last Sold 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.