Yes, a Pawn Shop can sell cars. A pawn shop can sell pretty much anything they want to (as long as it is legal). Some Pawn Shops will sell classic cars.
Pawn Shops are not illegal in most places. The term 'pawn shop' basically means that the shop will pay money to someone for their property so they can sell it. They are in no way illegal in that sense.
It might depend which state you live in though most states you have to be 18 to pawn or sell to a pawn shop.
How long a pawn shop holds on to your belongings depends on the pawn shop and what you agree to when you sell your item. It could be anywhere from a couple of days to weeks.
You can probably sell it at a pawn shop
Pawn shop
Pawn shop
Possibly, possibly not. Every pawn shop is different at what it will take and sell, but most likely not.
Just try a pawn shop.
Inform the police. Both the pawn shop and the individual selling it can be prosecuted.
Absolutely. If the person who surrendered the phone defaults on the loan payments - the phone becomes the property of the pawn shop... Inn which case - they're entitled to unlock the phone from its network and re-sell it to recover the debt.
When you sell at a pawn shop you won't get top dollar. This is also sometime for flea markets. Also keep in mind the amount of gas needed to cover the trip. If you take it to a pawn shop you will sell while at a flea market you might not have a buyer.