I think Kagejin has a great answer there.
When it comes to saving info on the cels I find the easiest and quickest way to create a folder for each series, save the picure with the title name followed by the number 01, 02, 03 etc.
Open this folder up and right-click the image. Where you see 'Properties' at the botom click it, then click the 'Summary' tab and then add whatever info you want to the 'Comments' section.
I do this for all cels that interested me whether I won them, lost them or they had no bids.
This is an example of the info I keep track of:
Seller = MrX. Winner = MrsX, 16,500y, 22 Bids. Wednesday 7th June 2006
I've considered adding the name of the runner-up bidder in case I have to compete with this person some other time. It's good to know who you're up against and what their bidding strategies are. A lot of strategies I keep in mind, some people bid in the last minute, some bid in small increments. I vary my strategy in case someone monitors how I bid

The most important factor is WHAT you bid, but I'll keep those details to myself, *hee hee*