Honest question: why don't you just put a buying order on masterXchange.com if you are so serious about it?
It feels like you are avoiding the oldest service using Mastercoin and, as one of the co-founder, I'd like to understand why.
I love masterxchange!
Hey wait a minute! How did you know that big buy wall isn't me?! Did you snoop?!

I may very well use it, but I am hoping there is some big fish out there who wants to sell a bunch of MSC but wasn't going to use the exchanges for fear of crashing the price to zero with their huge sell. If that person exists, I'm hoping to meet them soon.
Seems pretty sleazy to advertise your offer on an exchange chatroom then do the exchange in private.