Cheapest priced copy (Marvel Super Heroes Commander): $0.99 at Card Kingdom, near mint, their price list as of .
Doom's Time Platform 
Artifact · Rare · Marvel Super Heroes Commander · #431
Whenever you attack, exile target nonland card from your graveyard with two time counters on it. If it doesn't have suspend, it gains suspend. (At the beginning of your upkeep, remove a time counter. When the last is removed, you may cast it without paying its mana cost. If it's a creature, it has haste.)
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
2 printings · $0.99 to $3.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Marvel Super Heroes Commander | 103 | Rare | $0.99 | $2.49 |
| Marvel Super Heroes Commander | 431 | Rare | $3.49 | — |