Hello,
I think escrow contract only supports buyer, am i wrong?
For example; when the buyer verify the delivery everything works perfectly but if buyer don't verify the delivery, seller gives totally nothing and buyer can withdraw their funds...
So, why the seller trust to the buyer? In a beautiful world, yes it can be good but we are not in there i guess 
I think there should be some kind of consensus mechanism to protect buyer and seller both.
I want to build a project like this in these days, i'll be appreciated for any recommendation or idea about these type of project.
Thanks!