Cheapest priced copy (Commander Legends): $0.79 at Card Kingdom, near mint, their price list as of .
Ring of Valkas 
Artifact — Equipment · Uncommon · Magic 2013 · #214
Equipped creature has haste. (It can attack and {T} no matter when it came under your control.)
At the beginning of your upkeep, put a +1/+1 counter on equipped creature if it's red.
Equip {1} ({1}: Attach to target creature you control. Equip only as a sorcery.)
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
2 printings · $0.79 to $6.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Commander Legends | 469 | Uncommon | $0.79 | — |
| Magic 2013 | 214 | Uncommon | $0.99 | $6.99 |