Is Max Bid an option?

Yes, but only by the bidder when they are logged into their account.

The bidder can choose to include a max bid and the system will continue to bid on their behalf up to that max bid amount.

When a new bid comes in that exceeds the max bid, the bidder will receive a text notice with an option to bid again.

The max bid placed by a bidder can be viewed on the Bid History grid.