Add 'Removed' Section in drop-down menu.

When I sell a game locally and not on PriceCharting, I have to remove the item from my collection.

It would be really helpful if I could keep the data of said sold game for future reference.

I have been thinking about a list of same as the Collection, with all the previously filled details of the item (even editable?), especially with the date of removal, price bought and sold.