My brother bought a double din pioneer stereo from a flee market the other day and it didn’t work. We went back and they said it couldn’t be refunded. Is there anything I can do. Also how are these guys getting all this cheap merchandise that they sale in places like best buy and frys for like half the price. Is it refurbished do they get it from another country. I noticed that some of the brand name speakers are not in the latest crutchfield magazine. It looks very similiar but it isn’t the same wattage or amp as the current models. Whats the big deal????

Why do you think it’s called a flea market? By definition they tend to sell shoddy or dodgy gear.
If something’s too cheap then there’s usually a reason. They could well be buying up defective customer returns, old stock and counterfeit products which a huge number of Chinese/Indian/South American factories manufacture to sub-standards. There’s a common phrase which you should always bear in mind, "caveat emptor" (let the buyer beware).
In most markets traders have to pay rent in order to sell, if the trader is fleecing shoppers then it’s damaging the reputation of the market as a whole. If the trader won’t play ball then complain to the market inspector or to the company which runs the market.
Robsteriark is right on
a lot of manufactures do sell refurbished items through online retailers (some stores) but all of that stuff still comes with at least a 90 day warranty and is just as good as new
you are always better off going on the web to trusted sites (authorized dealers) or to a store (and remember some of these shops out here are no better than that pawn shop