Question: what are apps to sell stuff?
Answer: eBay. The popular ecommerce platform does offer a local selling feature and a mobile app, allowing you to reach its massive customer base right from your mobile device in order to sell items locally.
Etsy. ... 
Facebook Marketplace. ... 
CPlus for Craigslist. ... 
Carousell. ... 
LetGo. ... 
OfferUp. ... 
Vinted.