+1
Also, current excel export is unusable when local characters appears in coin titles.
One more thing is that it takes lots of time/clicks to understand whether you have a particular coin type of not.
For example, I see "Argentina 10 Centavos 1930" coin and would like to check whether I have this type.
In the excel file I only have "KM# 35 / 10 Centavos / 1926" so I need to open a particular coin page and check corresponding years. Time wasted, especially when you are checking against a long list.
So, another suggestion to this export list is to have an additional field like "period". For this particular 10 Centavos it is "1896-1942" so one can immediately understand that 1930 is the same KM#35 as 1926.
Cavaler,
In fact, the collection list is already being exported in a structured format via https://en.numista.com/vous/vos_pieces.php?page=X pages.
All you need to do is to simulate a login, then read several dozens of pages, then parse them to remove all extra-stuff.