There is a built-in escrow, which uses Bitcoin 2-of-3 multisignature. This means that if both buyer and seller are happy, they are the only two of three parties needed to release funds, but if either of the parties is unhappy they can bring in the escrow party.
Escrow is provided on a marketplace as well, anyone can act as an escrow agent.
Sounds cool, I just read the explanation, it's on the Features tab. But in the gif it is showing that you will have to pay for it, and it will be a % of the total business. Similar to what already occurs in other markets. But, as it will depend on a person, not a company, what is the legal responsibility of that third person in the deal? Will these people have a profile or decision history so you can decide who to trust? And are they responsible for the quality of the product or just to ensure that people will receive their product?
Escrow is provided on a marketplace as well, anyone can act as an escrow agent.