We don’t have a reserve price feature for auction items. The best way to set a minimum price would be to set the starting bid to that amount.
The main reason we don't use 'reserve prices' is that we feel it's frustrating from a bidder perspective. Every bid on BetterWorld has a chance to win the item and we want to generate that real excitement.
As far as maximizing the value of the items you have on display, we recommend setting low starting bids, opening up the auction for at least a week, then sprinting on publicity and getting the word out. The rest will take care of itself!