Base Set

Highest value first. Raw = ungraded, near mint. A dash means no second reading yet.

Card	Rarity	Raw	1D	30D	Trend	PSA 10
Energy Retrieval 81 1999-2000	Uncommon	£1.68	0.0%	-0.4%		£49.35
Charmander 46	Common	£1.66	+6.1%	+4.2%		£250
Weedle 69 1999-2000	Common	£1.66	0.0%	0.0%		£43.53
Staryu 65 1999-2000	Common	£1.66	-0.4%	-2.2%		£52.13
Dratini 26	Uncommon	£1.64	+2.3%	0.0%		£139
Drowzee 49 Shadowless	Common	£1.62	+4.3%	-35.0%		£132
Tangela 66 Shadowless	Common	£1.61	0.0%	-13.8%		£103
Revive 89	Uncommon	£1.60	-0.5%	-6.5%		£395
PlusPower 84 Shadowless	Uncommon	£1.60	-11.5%	+5.4%		£67.99
Ivysaur 30	Uncommon	£1.57	+11.5%	-38.3%		£177
Grass Energy 99 Shadowless	—	£1.57	+1.4%	+19.0%		£45.08
Super Potion 90 Shadowless	Uncommon	£1.57	-7.4%	-20.3%		£103
Doduo 48 1999-2000	Common	£1.57	-1.4%	+3.9%		£62.56
Kadabra 32	Uncommon	£1.56	+5.5%	+6.6%		£170
Psychic Energy 101 Shadowless	—	£1.52	0.0%	-13.9%		£67.99
Porygon 39	Uncommon	£1.49	+0.5%	-31.4%		£139
Bulbasaur 44	Common	£1.49	-10.2%	-20.8%		£244
Pokemon Center 85	Uncommon	£1.48	+2.6%	-2.4%		£443
Diglett 47 1999-2000	Common	£1.48	-20.0%	-33.1%		£86.10
Super Potion 90 1999-2000	Uncommon	£1.48	-8.3%	-7.8%		£41.79
Sandshrew 62	Common	£1.47	0.0%	+19.2%		£126
Machop 52 Shadowless	Common	£1.47	+2.6%	-9.1%		£107
Lightning Energy 100 Shadowless	—	£1.47	0.0%	+5.9%		£77.04
Gust of Wind 93 1999-2000	Common	£1.47	0.0%	+0.5%		£46.81
Full Heal 82	Uncommon	£1.45	+4.8%	+3.2%		£237
Switch 95 1999-2000	Common	£1.45	0.0%	+20.2%		£54.22
Charmeleon 24	Uncommon	£1.43	-6.3%	-12.3%		£167
Fire Energy 98 Shadowless	—	£1.43	+2.1%	-2.0%		£55.43
Rattata 61 Shadowless	Common	£1.40	+0.5%	-37.0%		£78.10
Haunter 29	Uncommon	£1.39	-3.6%	-14.9%		£133
Energy Removal 92 Shadowless	Common	£1.36	0.0%	+1.7%		£64.73
Potion 94 Shadowless	Common	£1.35	0.0%	-20.2%		£58.84
Defender 80 1999-2000	Uncommon	£1.32	0.0%	-8.7%		£46.68
Kakuna 33	Uncommon	£1.30	0.0%	-19.3%		£71.63
Dewgong 25	Uncommon	£1.29	0.0%	-33.2%		£161
Poliwhirl 38	Uncommon	£1.28	+4.2%	-4.4%		£115
Bill 91 1999-2000	Common	£1.26	0.0%	+6.9%		£56.91
Professor Oak 88	Uncommon	£1.25	+4.3%	-15.1%		£96.05
Farfetch'd 27	Uncommon	£1.18	+6.0%	-11.2%		£111
Pidgey 57	Common	£1.18	-0.6%	-7.0%		£70.95
Seel 41	Uncommon	£1.17	0.0%	+6.0%		£81.28
Staryu 65 Shadowless	Common	£1.16	+4.7%	-21.1%		£110
Ponyta 60 Shadowless	Common	£1.15	0.0%	-36.6%		£142
Abra 43	Common	£1.11	+0.7%	-14.3%		£105
Tangela 66	Common	£1.10	+7.2%	+15.5%		£78.03
Doduo 48	Common	£1.07	-2.0%	+4.3%		£77.65
Growlithe 28	Uncommon	£1.06	+5.1%	-21.3%		£90.19
Rattata 61	Common	£1.03	0.0%	-14.7%		£62.82
Caterpie 45	Common	£1.00	-2.9%	-31.1%		£73.90
Diglett 47 Shadowless	Common	£0.98	0.0%	-33.5%		£101
Gust of Wind 93 Shadowless	Common	£0.98	-1.5%	-38.9%		£63.56
Machoke 34	Uncommon	£0.97	-2.2%	-28.0%		£104
Energy Retrieval 81	Uncommon	£0.94	-11.8%	-14.8%		£85.88
Energy Removal 92	Common	£0.94	0.0%	-15.3%		£48.04
Jynx 31	Uncommon	£0.92	0.0%	-29.4%		£97.92
Diglett 47	Common	£0.92	-8.1%	-25.7%		£71.69
Drowzee 49	Common	£0.92	-1.6%	-1.6%		£89.87
Starmie 64	Common	£0.88	-5.6%	-20.7%		£78.89
Onix 56	Common	£0.86	-6.4%	-9.3%		£80.92
Poliwag 59	Common	£0.80	-35.7%	-21.2%		£76.08

Which rarities carry this set's value. Share is the tier's raw cards as a fraction of the whole set. The PSA 10 premium is the median multiple over raw within the tier — cards under £5 raw are excluded from it, and a tier with fewer than three qualifying cards shows no premium rather than a misleading one.