Yes, you can set a Max Bid when bidding at in a Pickles Live or Pickles Online auction.
You can do this by manually entering your highest bid number next to the 'Bid Now' button on the item you're interested in. A max bid is the highest price you are willing to bid on an item, but it will only put down what the next increment is. However, if anyone bids against you, the system will automatically bid against them on your behalf, all the way up until your max bid.
For example: You are interested in a car and set a max bid to a number you're comfortable paying for the vehicle. The system will bid in the sale on your behalf in small increments. It will not exceed your set limit.
The Pickles Online bidding system will attempt to have the buyer win the auction at the lowest price possible. Therefore if their maximum bid meets the vendor's reserve price then the current bid will increase to the reserve amount so that they are guaranteed to win the item.