For high-cost items, an escrow feature is often deemed necessary by both parties in any marketplace. Furthermore, without an escrow feature, buyers will tend t

For high-cost items, an escrow feature is often deemed necessary by both parties in any marketplace. Furthermore, without an escrow feature, buyers will tend to stick to highly reputable sellers, creating a barrier for new competition and enabling price and power consolidation. How might this be solved in a decentralized marketplace?