18 printings of Urza's Mine
They range from $0.60 to $23.00 — a 38× difference for a card with the same name. The set code and collector number printed along the bottom edge are what tell them apart.
| Ninth Edition | 9ED 327★ | — |
| Eighth Edition | 8ED 328★ | — |
| Double Masters | 2XM 370 | $23.00 |
| Antiquities | ATQ 83b | $22.08 |
| Antiquities | ATQ 83a | $15.63 |
| Antiquities | ATQ 83c | $7.17 |
| Antiquities | ATQ 83d | $5.21 |
| Fifth Edition | 5ED 427 | $1.09 |
| Commander Masters | CMM 1051 | $1.08 |
| Double Masters | 2XM 329 | $1.05 |
| Chronicles | CHR 114d | $1.01 |
| Eighth Edition | 8ED 328 | $0.92 |
| Jumpstart 2022 | J22 829 | $0.84 |
| Modern Horizons 3 Commander | M3C 401 | $0.76 |
| Chronicles | CHR 114a | $0.71 |
| Chronicles | CHR 114b | $0.66 |
| Ninth Edition | 9ED 327 | $0.60 |
Not sure which one you are holding? OtterDex reads the set code and collector number off the card and tells you.