as long s you know what your looking for. check there return policy before you buy it, some places are only a few days & some are a month
It would depend on the reputation of the pawn shop and the price of the camera.
Most pawn shops, where I'm from at least, will only accept working items. If they're selling it then they have someone who works there, knows about the item, and has inspected it.
If it's decently priced then I'd ask for more information on it and preferably the from the person who inspected it.