to appear on the market; to be in season (e.g. of fruit)
to circulate widely; to make the rounds; to go around; to float around
偽造品が出回っている。
Counterfeit goods are circulating.
新製品が市場に出回った。
New products appeared on the market.
旬の果物が出回る季節は買い物が楽しい。
Shopping is fun during the season when seasonal fruits appear on the market.