4 printings of Impending Flux
They range from $0.16 to $0.42 — 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.
| Doctor Who | WHO 977 | — |
| Doctor Who | WHO 386 | $0.42 |
| Doctor Who | WHO 87 | $0.16 |
Not sure which one you are holding? OtterDex reads the set code and collector number off the card and tells you.