Cheapest priced copy (Edge of Eternities Commander): $0.59 at Card Kingdom, near mint, their price list as of .
Thought Monitor 
Artifact Creature — Construct · 2/2 · Rare · Foundations Commander · #80
Affinity for artifacts (This spell costs {1} less to cast for each artifact you control.)
Flying
When this creature enters, draw two cards.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
8 printings · $0.59 to $4.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| The Brothers' War Commander | 98 | Rare | $1.29 | — |
| Edge of Eternities Commander | 79 | Rare | $0.59 | — |
| Foundations Commander | 80 | Rare | $0.59 | — |
| Foundations Jumpstart | 373 | Rare | $0.59 | — |
| Modern Horizons 2 | 71 | Rare | $0.59 | $4.99 |
| Modern Horizons 2 | 341 | Rare | $0.69 | $3.99 |
| Murders at Karlov Manor Commander | 121 | Rare | $0.59 | — |
| Modern Horizons 2 Promos | 71s | Rare | — | $4.99 |