[Bob]

Unless you're trying to hide something.

Unless he had his collection professionally appraised, the victim of the theft can claim anything he likes about the supposed value of the coins. After the fact, common gold coins in beat-up condition (with no numismatic value at all) can suddenly and magically be transformed into rare ones in mint condition.

[Fresh Wind]

Unless he had his collection professionally appraised, the victim of the theft can claim anything he likes about the supposed value of the coins.

He may have been going on "insurance value" which is generally far higher than real market value.