Grouped by series; cel number, background, 
sketches, short descript, price, date, source, 
other notes, means, medians, color coded in 
Excel, and another sheet for all cel sales... ;) 
Not as detailed as Keys, though. Record-keeping 
is generally a good habit for all monetary 
expenditures, I think, especially on limited 
funds; well, it also forces me to be "good" when 
I see the numbers. ::scary::