Mavi Müzayede is an online auction platform and a brand of PHEBUS, bringing buyers and sellers together to trade through online bidding. Members can browse current auctions, review featured lots, and place bids on items they would like to acquire. The site also provides access to an auction archive, auction rules, and information about participating, helping users follow both ongoing and completed sales. Its listings include events such as Ottoman-language book auctions and mixed auctions.

For people wishing to sell, Mavi Müzayede invites them to submit images of the items they are considering offering and provides a free appraisal service. The platform is designed to help sellers present items for auction and to give buyers the opportunity to add rare pieces to their collections. Users can register or sign in to take part, manage bids, and follow their activity through account features such as a watchlist and purchase records. Mavi Müzayede offers a digital route to buying and selling through auctions, with customer support and guidance available on its website.