I work at a guitar shop, and we just took in a used Fender BXR300C combo. The thing is, neither myself nor my boss can figure out how much we should sell if for. It was made in 1991, but it was never taken outside of the owner's house. It is in perfect condition, except for a minor wiring issue, which we will get fixed. Anyone know how much it would be worth? We were thinking that about $400 or so.