The values shown are Fair Market Values.  Once you click on an item you will be able to see the current bid amount and the next bid step.  Use Max Bid and the system will bit for you up to the Maximum amount you set.  The Max Bid must be at least two bid steps higher than the next bid step to work for you.  

Toy

Elam Plus Radio Controlled Hydroplane

Dream Come True
Current Bid: $250

Inflatable Miller Hydroplane Raft

Dream Come True
Current Bid: $131

Oh Boy Oberto Inflatable

Cool Collectors Item
Current Bid: $66

Graham Trucking R/C Hydroplane

Great Value
Current Bid: $88

Freedom Racing R/C Hydroplane

Cool Collectors Item
Current Bid: $53