Professor's Research
| ebay.it | n=5 | $4.18 | +24% |
| ebay.com | n=120 | $3.87 | +15% |
| ebay.co.uk | n=12 | $3.83 | +14% |
| ebay.es | n=5 | $3.52 | +5% |
| ebay.de | n=24 | $3.37 | — |
How is this value calculated?
| Evidence path | Sales | Age | Value vᵢ | Weight gᵢ |
|---|---|---|---|---|
| eigene rohe NM-Verkäufe | 88 | 33 d | $3.86 | 718.37 |
| eigene LP-Verkäufe ÷ 0.8859 | 5 | 33 d | $4.34 | 5.54 |
| eigene PSA9-Verkäufe ÷ 2.3932 | 2 | 45 d | $6.81 | 0.82 |
| eigene PSA10-Verkäufe ÷ 17.709 | 4 | 2 mo | $4.11 | 0.23 |
Measured error for this era×language (backtest): ±17 %
| Evidence path | Sales | Age | Value vᵢ | Weight gᵢ |
|---|---|---|---|---|
| en roh NM × 1.1114 (Sprach-Faktor aus 135 Karten) | 88 | 33 d | $4.30 | 1.31 |
Measured error for this era×language (backtest): ±22 %
| Evidence path | Sales | Age | Value vᵢ | Weight gᵢ |
|---|---|---|---|---|
| en roh NM × 1.033 (Sprach-Faktor aus 50 Karten) | 88 | 33 d | $4.00 | 0.69 |
Measured error for this era×language (backtest): ±20 %
Gate not green — shown only here, never as the price.
| Evidence path | Sales | Age | Value vᵢ | Weight gᵢ |
|---|---|---|---|---|
| en roh NM × 1.1074 (Sprach-Faktor aus 148 Karten) | 88 | 33 d | $4.28 | 3.92 |
Measured error for this era×language (backtest): ±18 %
No PSA numbers for this print yet — in any language.
Frequently asked questions
Is it worth grading Professor's Research SWSH Black Star Promos SWSH152/307?
A PSA 10 currently sells for about $72.79, raw the card sits at $3.86 — 18,9× as much. Of 950 copies already graded, 33 % received a 10 and 53 % a 9. Mathematically, submitting returns $38.00 on average, before fees and shipping. Rule of thumb: submit when the value at a realistic grade is at least double the raw value — which is the case here. Centering decides it: an off-centre card will not get a 10. The grade distribution comes from the PSA Population Report; people pre-sort before submitting, so your own hit rate may differ.
Auction or Buy It Now — which gets more for Professor's Research SWSH Black Star Promos SWSH152/307?
Across 15 auctions the median was $4.18, across 28 fixed-price sales $3.86. There is no meaningful difference — what matters here is how fast you want to sell.
What will I get for Professor's Research SWSH Black Star Promos SWSH152/307 if I want to sell quickly?
Half of all sales fell between $3.13 and $4.43, with a median of $3.86. 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 SWSH Black Star Promos SWSH152/307 unrealistic?
The cheapest genuine sales were around $2.50. Offers well below $1.50 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.
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