OfferUp is a mobile app designed for local buying and selling. Users can list items with photos and descriptions, while buyers browse nearby listings. Communication is facilitated via the app's messaging feature, simplifying transactions. The app also includes a rating system to build trust within the community.

Yes, OfferUp is free to download and use for both buyers and sellers. There are optional fees for features like promoting listings or shipping, but most functionalities are available without cost.

OfferUp emphasizes safety by offering secure messaging and profile ratings. It recommends meeting in public, well-lit areas for face-to-face exchanges and provides safety tips on its website. Additionally, the 'TruYou' program allows users to verify their identities with government-issued IDs, adding security.

Yes, OfferUp supports selling items of all sizes. Sellers should consider logistics for large items, including providing clear descriptions and images, and arranging delivery or pickup options. Shipping is also available for smaller items.

OfferUp offers flexible payment options. Cash is common for local transactions, while the app's secure payment system supports online payments for shipped items, protecting both buyers and sellers.