Some dealers sort their lists by KM numbers,
Out of sheer curiosity, can there be any different referencing points instead of KM? Not that I have anything against it, they are great, however as was rightly pointed out to me sometime back, they do miss a lot on India and BI coin variety.
And if you look at the starter of the thread (from his website) he is mainly into BI.
Maybe a dumb question, but is there a referencing no from Priedmore or some other authoritative guides for BI besides KM?
On the db front
One advantage of excel is that it can be stored online (dropbox, g drive, sky etc) and still opened from online storage using an intelligent device. I can think of this being advantageous if one is buying coins from dealers, fairs(something is nowdays happening a lot in India). Though on second thoughts I doubt whether the dealers have a logical pricing

Pivot is what even i second to PP. works like a magic wand

Regards,