Sounds like you did great work! Call me stupid, but I can't find the link to download the spreadsheet.
I know this is an old thread, but I found it because I decided to make my own spreadsheet and figured I'd see if anyone had done the same to fill in some holes in my data. I don't have near the calculations you do. All I've calculated is the total loss and percentage of loss on the sale of cards, both upped and unupped.
I get bored of my deck quickly and often sell cards to build a new deck. I started thinking I've lost tons of money by selling all those cards and decided to figure out loss percentages for all the cards. That way, if I have a choice between selling two cards I can choose the one with the lowest loss percentage. Even if that choice sells for less than the other, if the percentage of loss is less it's the better choice in the long run, assuming it gives me enough to buy the new card I'm wanting.
Anyway, how can I get this spreadsheet?