I have a list of the ~66 keyboards I've owned so far.
What do you track in your list besides the name of the board?
Well, I have a visual inventory system for keyboards. I have all of my keyboards stacked up in boxes in my home office. I can just look at the labels on the boxes to see what I have. I am proud to say that I am down to only 25 keyboards right now, and I'm hoping to reduce that number in the next few weeks with a Classified thread.
The only spreadsheet I ever made was the one that I created to keep track of Clacks. The Column Headings I had were: Clack Name, Color(s), Switch Type, Price Paid, Date Purchased, and Seller Name. The purpose of the spreadsheet was to keep track of what I had, and how much I paid, and who I got the Clacks from. But, I got busy and fell behind in my cataloguing, so the list is now incomplete. I guess I should update my spreadsheet.
I think my system would work well for keyboards as well. Use my column headings, and use a new row for each keyboard. Other columns you might want to add are: Condition of Keyboard (NIB, used, shiny, etc.); Keycaps (OEM, SP, GB set, etc.); and Connector type (USB, PS/2, DIN, etc.). You could also add a column for resale value, if you wanted to keep an eye on the total $ value for your collection. And if you wanted to be thorough, you could add a row at the very bottom where you subtract total current value from total price paid, in order to find out how much your keyboard collection is really costing you. Which may be more or less that you thought, so be careful. Not everybody is comfortable with the truth. And it goes without saying that wives are never comfortable with this kind of truth, and don't really need to know that information. Not even attractive and understanding wives like Mrs. Mashby really need to know that kind of info.
Just my opinion.