For a very nice factory d&t 99EG in 250-3000, that price isn't unreasonable, especially if you could talk him down. But you didn't miss out on the deal of the century.
Make sure you have the bolt/lever open when trying to remove the barrel. And don't twist hard if you use the forearm to twist it, you won't believe the number of forearms with cracks due to that. I'd use something else than the forearm - but no wrenches or pliers, either.
