Better. These are fine stamps, but of those pictured I already have all
but 2 or 3.
Which ones don't you have and I send them to you for free. Send me a
stamped self addressed envelope and I'll send them to you.

But then you would not be able to deliver them to the buyer of this lot!

I don't need to take them from this lot. I have a few to many copies of
each of these stamps to spare. Not to diminish the value of this lot you
understand.

Dave
Use commemorative stamps on ALL your mail.
Introduce the hobby of collecting stamps to someone.
Above all, enjoy your hobby regardless of what you collect!