If you are logged in as admin, you can view the complete history of what has changed on an item since it was originally entered. It is available from a new "History" button, located on the item screen at the bottom to the right of the save button.
This is a great way to determine whether a given bid price is what the original donor put in (or often what a volunteer entered from the paper form), or whether it is a (much later) edit - you can also see if a date got changed ... etc. It may help resolve some disputes or questions that might otherwise be difficult to research. There are no reports (yet) based on this information, so for now, your data entry folks can't use this to keep track of who entered the most bid sheets.. but if you have a training issue with someone, this might be a way to identify the scope of the problem.