Hi,
When I browse for coins on other websites (I know, feels like cheating!), I always take a look at my wishlist. It sometimes happens that I already have an item for which I forgot to uncheck the “I wish to get this coin” checkbox, resulting in buying coins that I already have. I use the page for coins I don't wish to mark coins that I bought somewhere, to prevent them getting added to a swap. Again, I sometimes forget to uncheck the checkbox on the coin page.
Would it be possible to add a green check ✓ behind a line in the pages “Selected coins/banknotes/exonumia I wish” and “Selected coins/banknotes/exonumia I don't wish” to indicate that it is in my collection?