Keep an eye on Ebay - there are two Dutch sellers who regularly put mint 3500b's up for sale, I've bought from both of them and they are good sellers. I forget one sellers name, but the other goes by the name of Rebe (Rebe Reels), and he specialises in sourcing and then selling mint or very good condition Shimano's. He's a v. reliable seller, and delivers within a few days, recommended.