Is it worth fixing a seized engine on 1997 Honda CR-V?

Not knowing the mileage or the condition of the vehicle, this is a difficult question to respond to. CR-V engines are the same engines as in the Civic and they should be as common as dirt. But - whether you should buy a replacement or have the original re-built depends on too many factors that are unknown. Look at the cost of the re-build versus the replacement cost of the vehicle and/or it's value on the used car market. and make your decision.