Here's a bit more data from Star Wars Tracker going back to 2012 - I'm including graded MOC here just to boost the hits a little.
I guess the main take home is that Harbert MOC very rarely come to open market
edd_jedi wrote:Ouch, I was the under bidder on a few items I wanted, never mind. I did win a very nice POTF AT-ST Driver though
Lindo wrote:Thanks for the info guys, so pretty much the only difference is the offer has an Australian address, that's nuts to warrant the price difference