Not necessarily to steer clear of. Likely means the old ones were no longer serviceable. And given the date range of the replacement barrels, sleeving wasn't yet a common practice.

Less valuable than if the gun had the original barrels in good condition; more valuable than if it had sleeved barrels. If you're looking for a shooter rather than a collectible gun in original condition, and if it handles well with the replacement barrels, it's a good way of saving some $.