Cheapest priced copy (Unfinity): $0.35 at Card Kingdom, near mint, their price list as of .
Stiltstrider 
Creature — Rhino Performer · 5/4 · Common · Unfinity · #157
Reach
When Stiltstrider enters, you get {TK}{TK}, then you may put a sticker on a nonland permanent you own.
Legal inCommander
Banned inLegacyVintagePauper
Not legal inBrawlStandardPioneerModern