noun
second-hand shop; curio shop
A shop that sells used goods, often with a focus on curios, antiques, or collectibles. The term can also refer to a dealer in such items.
あの道具屋で古い時計を見つけた。
I found an old clock at that second-hand shop.
彼は道具屋を営んでいる。
He runs a curio shop.
Specifically an antique shop, emphasizing old and valuable items.
Compound of 道具 (tool, implement) and 屋 (shop, dealer). The meaning extended from a tool shop to a second-hand shop dealing in various used goods.