What is the recommended escrow method?  I'm interested in the buyer and the seller side of things.  I'm waiting for a batch 3 Avalon (4 module) to arrive and it was a 4 person, equal investment to buy it in march. 

We took a vote and decided that it is in our best interest to sell the miner.  I don't want to post the sale ad until I physically have it (this could be a while).  I just want to be ready when the time comes.  Is there a recommended escrow method that this forum uses effectively? 

-Mike