I have 37' of .050 3/8 (.375) stihl Rapid Micro chain with master links (4 I think). The chain is brand new.
I also have 100' of .063 3/8 (.375) stihl rapid micro chain that has all of the boxes, master links etc. This is brand new and only the box has been opened.
Make me an offer if your interested. I don't use RM chain anymore, 'cause RS cuts faster.