I work with a lot of software programs for online bidding, and I recommend that you make sure your software choice makes it easy for guests to set a maximum bid and let the system bid for them up to their requested amount. You’ll see here in Auctria (an affordable online and live event software) that guests can choose how much they want to bid right now AND how much is their limit for this item. You can easily set the system to send alerts each time someone tries to outbid them and thus their bid has been raised to keep them winning. If the bid goes beyond their set limit, they’ll get an outbid notification. Setting a Max Bid is the easiest way for guests to enjoy the night AND win the items they want.