Right now escrows over lightning (ala HODL invoices like robosats) are limited to about 24 hours and require a third party to resolve disputes.

Dispute resolution requires a third party to make a judgement for one or the other party, and in order to do so the funds need to be held in trust until two of three parties agree who should be paid. The problem with shipping products is this can take weeks or months.

I believe the de-facto resolution to this underlying need for third party conflict resolution was solved first by ebay with the reputation score. This is why nostr is a perfect platform for a marketplace, your social media reputation is tied to your financial reputation. Then your transaction history score becomes an asset you should want to protect and thereby everyone is motivated to be honest without the force of government.

There will always be cases where people get pissed off at one another because someone was late, got sick, thrown in jail, in a car accident, shipped the wrong thing or was dicking around with payment. You don't have protections like that on Craigslist either, so a marketplace based on reputation should be as good as a handshake agreement, and you should have the same level of trust established with your service providers that you chose to business with and are part of your splits.