Damaged sheath

[A. G. Maisey]

A repair to this gandar is simply not economically nor aesthetically viable.

A pendok could be a valid solution, as Rick suggests.

Did the seller make any suggestions for making this damage good?

Since he is a professional, he should have, and he is the person whom you should approach first.

Something like this is an unfortunate experience for somebody with a newly awakened interest in the keris.