For the moment, I only list them in the Katalog IV. Condition is either good or bad, and as long as it's complete, it's good
I have entered some of my other collections into MS Works, but the trouble is that no one else uses it, so I cannot export it very well. I have once made an Excel from a MsWorks, but it was a lot of trouble to get it right.
I'l probably start a database once my Smurf cabinets are made (way in the future), and the info I'll need is: Name, Cat n*, variation N*, markings, condition, Cat value, purchase price, estimated resale value, special (i.e. a box that says promo, sockel, sharpener, ...), and remarks. This is for all loose Smurfs, for the Supers you'll have to add things like box and so on. I don't know if I'll include the mold number, perhaps not, as I don't collect these separately (yet).
I'll probably make a list of all markings separately, so I don't have to describe the exact Bully marking all the time, but can just say Bully mark 1, 2, ...
Perhaps such a list can be made here on the board, like we have Dyar's lists of boxes, playsets, ...?