Record Store is a rare Artifact — Contraption card from Unstable (UST), collector number 201. Current market price: $0.26 (foil $0.57), TCGplayer market prices via Scryfall.
Whenever you crank this Contraption, look at the top X cards of your library, where X is the number of artifacts you control. Put one of those cards into your hand and the rest on the bottom of your library in a random order.