Hello rusty420 -
That is correct, we recommend using an amount with change so yes, $79.99 would be an appropriate bid.
We do not recommend lead times of less than 5 seconds, although the lowest lead time you can set is 2 seconds. The 5 second lead time increases the chances of your bid being set appropriately. Bid Enhancements are optional and can raise the amount of a win by however many increments you select. Please see the Help window regarding Bid Enhancement on the My Snipes page by clicking on the "?". If you have more specific questions after taking a look, please feel free to file a support case from under the Help tab and we'll be happy to assist you further.