4 printings of Whirlwind
They range from $0.49 to $1.63 — a 3× difference for a card with the same name. The set code and collector number printed along the bottom edge are what tell them apart.
| Urza's Saga | USG 283 | $1.63 |
| Starter 1999 | S99 150 | $0.99 |
| Commander 2014 | C14 224 | $0.49 |
Not sure which one you are holding? OtterDex reads the set code and collector number off the card and tells you.