Agreed - those who have them, keep them. I am waiting for a second MP (new, not used - I had to go for new because, like you, I couldn't find a s/h one anywhere) and it's taking some two months to get a black one where I am based (Istanbul, Turkey) - if I'll have a say in it, you can be sure I will not be selling either of them
on the other hand, M7 & M8 can be found relatively easy on the s/h market for whatever reason.