When should transaction history become reputation?

I’ve been thinking about this while working on a product involving transactions between people who may not know each other.

A seller can complete 30 successful transactions, but the next customer may still know almost nothing about that history.

The obvious answer is to show completed transactions, ratings or reviews.

But that creates another problem.

At what point does useful transaction history turn into a misleading “trust score”?

For example, I can see value in showing:

• number of completed transactions
• reviews tied to actual transactions
• how long the account has existed
• factual fulfilment history

But I would be uncomfortable turning those into something like:

“92% trustworthy”

because past activity cannot guarantee the next transaction.

For anyone who has built marketplaces, reputation systems or trust features:

What information have you found genuinely useful to show, and what signals created more confusion than value?