I bought a cart full of old Display model tools from Home depot. They cut the cords off of them, So i wound up replacing them. I garentee if it worked before, And you put a new cord on it [id go 10+ foot, So you dont "Have" to have an extension cord], It'll work after. Corrosion or not. However, Id solder + shrink wrap it.
Also, Imma have to go look for routers in pawnshops, If there going for 20>*