Hello,
This website is about used stamps and the members would aspect to receive used stamps in packages of 100. They like used stamps and most of them are very sensible about other types. This is also true about CTO's and definitives.
If you want to insert a few mint ones, check your partner's profile and see if he says something about this. I'm sure there are a few members like me that would not mind receiving some mint stamps. But you should check first their profile or you can also contact them before sending.
