| ebay.de | n=10 | £22.92 | +45% |
| ebay.com | n=22 | £15.79 | — |
How is this value calculated?
| Evidence path | Sales | Age | Value vᵢ | Weight gᵢ |
|---|---|---|---|---|
| eigene rohe NM-Verkäufe | 5 | 3 mo | £22.98 | 40.82 |
| eigene PSA9-Verkäufe ÷ 3.5492 | 3 | 2 mo | £16.62 | 2.0 |
| eigene LP-Verkäufe ÷ 0.7207 | 9 | 2 mo | £19.32 | 1.9 |
| eigene PSA8-Verkäufe ÷ 2.0385 | 2 | 2 mo | £18.70 | 1.39 |
Measured error for this era×language (backtest): ±17 %
| Evidence path | Sales | Age | Value vᵢ | Weight gᵢ |
|---|---|---|---|---|
| en roh NM × 0.325 (Sprach-Faktor aus 49 Karten) · Set -27% nachgeführt | 5 | 3 mo | £6.16 | 0.43 |
Measured error for this era×language (backtest): ±36 %
Gate not green — shown only here, never as the price.
| Evidence path | Sales | Age | Value vᵢ | Weight gᵢ |
|---|---|---|---|---|
| eigene rohe NM-Verkäufe | 2 | 12 d | £17.43 | 16.33 |
| eigene PSA10-Verkäufe ÷ 16.8904 · Set -13% nachgeführt | 2 | 2 mo | £4.48 | 0.13 |
| en roh NM × 0.799 (Sprach-Faktor aus 49 Karten) · Set -13% nachgeführt | 5 | 3 mo | £16.84 | 2.63 |
Gate not green — shown only here, never as the price.
No PSA numbers for this print yet — in any language.
| 2026-09-20 | FR | RAW NM | Carte Pokemon Smogo 51/102 Set de Base Edition 1 NM-Mint 🇫🇷 · eBay | £17.43 |
| 2026-09-11 | DE | CGC 8.5 | Pokemon Smogon 1. Edition 51/102 CGC 8.5 Base Set Deutsch · eBay | £27.21 |
| 2026-09-11 | DE | PSA 9 | Pokemon Smogon 1. Edition Deutsch 51/102 Base Set PSA 9 Mint · eBay | £67.98 |
| 2026-09-11 | EN | PSA 10 | Pokemon Koffing 1st Edition 51/102 Base Set PSA 10 GEM MINT · eBay | £636.06 |
| 2026-07-26 | EN | RAW UNKNOWN | Pokemon Cards: Base Set 1st Edition Common: Koffing 51/102 · eBay | £21.92 |
| 2026-07-24 | EN | RAW LP | Koffing 51/102 Common Base Set Shadowless Pokemon 1st Editio · eBay | £11.81 |
| 2026-07-24 | EN | RAW LP | Koffing 51/102 Common Base Set Shadowless Pokemon 1st Editio · eBay | £11.87 |
| 2026-07-22 | EN | RAW LP | Koffing 51/102 Base Set Shadowless Common 1st Edition 1999 L | £15.81 |
| 2026-07-21 | EN | PSA 7 | PSA 7 1st Edition Shadowless Koffing 51/102 Pokémon 1999 Bas | £36.38 |
| 2026-07-21 | EN | RAW MP | Pokemon TCG Koffing 51/102 1st Edition Shadowless Moderately | £9.10 |
| 2026-07-21 | EN | RAW LP | Vintage LP 1999 wotc Pokemon Cards Base Set 1st Edition Comm | £16.22 |
| 2026-07-20 | EN | PSA 8 | Koffing 51/102 - Pokemon Base Set Shadowless 1st Edition - P | £39.54 |
| 2026-07-19 | FR | PSA 10 | 1999 POKEMON BASE FRENCH #51 KOFFING PSA 10 SMOGO 1ST EDITIO | £63.21 |
| 2026-07-19 | EN | CGC 7.5 | 1999 POKEMON BASE SET 1ST EDITION #51/102 KOFFING CGC 7.5 | £15.25 |
| 2026-07-19 | EN | PSA 9 | Pokemon 1999 Koffing 51/102 1st Edition Base Set PSA 9 | £57.26 |
| 2026-07-19 | EN | CGC 8.5 | Pokemon Koffing Base Set Shadowless 1st Ed. 51/102 CGC 8.5 | £22.31 |
| 2026-07-19 | EN | RAW NM | Pokémon Koffing #51/102 Shadowless 1st Edition 1999 Base Set | £26.03 |
| 2026-07-18 | EN | RAW NM | 1999 Pokemon KOFFING Base Set 1ST EDITION Shadowless Non Hol | £21.56 |
| 2026-07-18 | EN | RAW UNKNOWN | Koffing - 1st Edition Shadowless - 51/102 Base Set - Pokémon | £22.30 |
| 2026-07-18 | EN | RAW HP | Pokémon TCG - Koffing - Base - 1st Edition Shadowless - 51/1 | £8.22 |
#243 · SEC
#SV076 · SR
#114 · C
#48 · U
#61 · C
#62 · C
#79 · C
#27 · C
#60 · C
#56 · C
#68 · C
#50 · U
#72 · C
#28 · CFrequently asked questions
Is it worth grading Koffing Base Set 51/102?
A PSA 10 currently sells for about £636.06, raw the card sits at £22.73 — 28,0× as much. Mathematically, submitting returns £636.06 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.
Auction or Buy It Now — which gets more for Koffing Base Set 51/102?
Across 8 auctions the median was £32.24, across 12 fixed-price sales £27.21. Auctions therefore fetched about 18 % more — worth it mainly for sought-after cards with several bidders.
What will I get for Koffing Base Set 51/102 if I want to sell quickly?
Half of all sales fell between £12.64 and £23.72, with a median of £17.43. 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 Koffing Base Set 51/102 unrealistic?
The cheapest genuine sales were around £11.08. Offers well below £6.65 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.