In my opinion, this is the only swap meet in Vegas. Yes, I know there is a supposed "indoor" one but aren't authentic swap meets only outside? Anyway, this place has everything. You name it, you can buy it! There is beer and great food for the family. There are small businesses selling their wares weekly and there are garage sale type sellers looking to declutter. I also really enjoy watching the Mariachi bands playing in the center of the meet and the clientele is all there for a good time and good deals.
Pro tip: Never play asking price. Half the fun of swap meets is the haggle!