New comments in "I wish to get this coin", and show them in exchange page

Sometimes I have a coin and I select the checkbox "I wish to get this coin" because:

• I have a low quality coin (F or less) and I want get another one with hight quality (VF or more).
  
• I have a coin of one subtype and I want get of another subtype. For example Colombia 20 centavos KM# 215 https://en.numista.com/catalogue/pieces1323.html. If I have KM# 215.1 and I want a coin of KM# 215.2.
  

It would be useful to be able to write comments "I wish VF or more", or "I wish KM# 215.2".

In exchange page, coins with heart icon show message "This coin is in my swap list". Instead of this message, can be shown the new comment.

​I like this idea. Sometimes I want to add a comment like: "￥4 at local market", so won't have to search every time when swapping by value. I'll try writing a browser plugin to solve this problem.