flea market

Short definition from Wiktionary

Noun

1. 1
   An outdoor temporary market selling inexpensive antiques, curios, etc.
2. 2
   A permanent indoor market of stalls in a warehouse selling inexpensive antiques, outdated goods, curios, etc.
3. 3
   Alternative form of flea market.

Verb

1. 1
   To sell (something or things) at a flea market.