That's a high price, even for a "rust free" copy. I would expect it to need nothing for that much money.
If it needs any of upholstry, chrome, wood, door seals, the price should drop significantly. If there is bondo hiding rust, again, the price should drop.
If it's got little fins, it's a 111. If it has round fenders, it's a ponton (and it won't be that year).
Check out http://home.hiwaay.net/~gbf/mbmodels.html