You will develop an application that can be used from a group page on Facebook. It will allow people who join the group to be able to list items for sale and have other group members make bids.
When someone lists and auction they will specify:-
The auction title [mandatory field]
Location [mandatory field from a list that I can provide]
Starting bid [this or the buy it now price must be completed - if both then buy it now must be higher than starting bid]
Buy it now price [this or the buy it now price must be completed - if both then buy it now must be higher than starting bid]
Item description [mandatory[
Shipping fee [may be blank or contain free text]
Category [from a list that I can provide]
Payment type [must be one or combination of bank transfer, cash on collection/delivery or Ripple, Ethereum or Bitcoin]
End time [must be a time within the next 7 days and is mandatory]
Contact details [THIS WILL NOT BE SEEN PUBLICLY]
If an auction receives a bid in the last 5 mins then the end time of the auction is increased by 5 mins.
Users will not have to login again other than their initial Facebook login.
The app will somehow allow us to sort by most recent listing, soon to end, most popular and by category
Auction winners and listers will be notified at the end of auction and the winner will be sent the contact details of the lister.
If you require external hosting, I can provide that via a Digital Ocean VPN (Linux Ubuntu).
The action listing should always show who has bid, how many bids and the current auction price.
The lister must have the facility to cancel their auction at any time.