RE: what advantages does the baja 5sc have over the 5b?
If the price of a body is what determines if you buy car x over car y then you probably shouldnt be getting in to this hobby (or at least large scale any way). The larger the car the more expensive parts are. It isn't nothing to drop $100 bucks in parts for these things.
The price of a body, or the arugment that they (large scale in general) are cheaper because they run gasoline vs glow fuel is not really a valid arguement. If your going to make the plunge and get a large sale rc, then get the one you want, not the one that is the easiest on the wallet. If the wallet is the ultimate decision then keep all the money and dont buy one. You will be much farther a head if the goal is to save money.