So do you want them knowing they are MOC? They are actually selling better then I thought. Most people just wanted pics first, so I'm sure more will go now.
And about the sentinel, I know they are highly tradable, so i figure if someone wants a few things i have, i'll trade them my stuff for a sentinel. I don't care. Plus I don't have that much wants. Some people only want to trade figs for figs. So I have that option. Plus I can always trade sentinels later.