I think you meant SureFire forend. They sell for $80ish in good shape on gunbroker nowadays but you’re right about the price new 20 years ago. They can be upgraded to LED with the kit from Malkoff.
You have no idea how badly I want one with those sight!!! IMHO you got a good deal, I’d have def paid that. That’s a fantastic shotgun. Great score for sure!
It’s probably worth upgrading the light in that SureFire with an LED using the Malkoff conversion.