Emerald Zone
Auction system based Market

Following would be the types of auction

1.Ascending or English (as in the times of Holy Prophet Muhammad s.a.w.w)

2.Descending or Dutch (With lowest limit defined  and Specially in cases of high inflation)

3.First price sealed

4.Second price sealed

Special apps offering prices, displays at the tops of markets/shops and making it more common at consumer side too,rather than only B2B.

Dutch system promoted specially in times of inflation

A Hungarian auction shopping website