Trades dont really happen.
People always want the better end of the deal, so just sell the units on ebay then use the money to buy an s9 is the realistic choice.
Escrowers are far too busy as well which also delays the small deals like this let alone respond to PM`s in a reasonable time.
If you can hold out and bump your thread within a month someone may bite, but thats a big "if" so instead use the time you have given.
I haven't found that escrowers are far to busy these days. Although I don't know how they'd handle a trade the top escrow agents on this site have been pretty responsive when I've used them.