Professor Oak's New Theory
HeartGold SoulSilver · 101/123 · Uncommon
Set release: 10 February 2010 · 16 years, 7 months
Estimated value · Normal
£0.10–£0.20
check variant
Based on Cardmarket (EU) sales, converted from euros at the ECB rate (1 EUR = 0.8503 GBP). Near-mint, ungraded.
Listings from £0.02. This is an asking price, not a sale value.
Updated 2026-10-04
Compare sales and grading
Check the exact card number, language, variant and condition when comparing results. Graded cards have their own market; the estimate above is for an ungraded card.
- Search eBay sold: ungraded
- Search eBay sold: PSA 9
- Search eBay sold: PSA 10
- Search eBay sold: ACE 9
- Search eBay sold: ACE 10
These links open searches on eBay, which may include related cards. Check the listing details and postage. Results are not included in the estimate above.
Look up Professor Oak's New Theory, HeartGold SoulSilver, 101/123. Population counts show cards graded by each company, not the total number printed. Compare each grader separately. PSA may ask you to sign in.
Price history
Cardmarket trend in GBP. Up to 180 days of recorded snapshots.
2026-09-112026-10-04
Variants
- Normal£0.10–£0.20
- Normal · pattern 2£1.50–£2.00
- Normal · pattern 3No price
- Normal · pattern 4No price
- Normal · pattern 5No price
- Normal · pattern 6No price
- Normal · pattern 7No price
- Normal · pattern 8£7–£8
- Normal · pattern 9No price
- Normal · pattern 10£0.60–£0.70
- Reverse holo£1.50–£2.50
- Reverse holo · pattern 2No price
Illustrated by Ken Sugimori