If you enjoy flea markets or thrift stores, you will enjoy this.
We went early on a Sunday morning. There are 2 entrances into this area from 42nd street on the Hialeah side and the Gratiny, I think it's called, in Opa Locka. (Please see a map. I wasn't driving.) Cost is $2 per car. Parking was plentiful. Basically, you can park anywhere around the entire radius of this thing. Just park near what looks interesting and remember where you are. We parked near some birds. Can't forget that. We walked more or less in a circle, saw the birds and there was the car. No problem.
Merchants were just opening up. I bought 3 dresses I've not seen online or in other clothing stores, undies, etc. The prices were not terribly cheap, I assume due to the pandemic (everyone's gotta make a living) or Christmas price gouging), but the merchants were willing to haggle a bit with us and bring the price down a tad. Warning, merchants were a little aggressive if you're not use to that sort of thing. Well, aggressive may be too strong a word... Let's say anxious to make a sell.
So, categories of items sold were animals (fish, birds, chickens, rabbits) along with their accessories; shoes for all ages (athletic, flip flops, work boots); limited bedding, beds, sofas, kitchenettes, small electric grills, luggage (everyone seemed to have the exact, same items for sale); work clothes, used tools. We did not find what we came after - a tv wall mount. Didn't see any tvs, either. Only music speakers of all sizes and a couple cell phone shops.
Lastly, there are food vendors with Latin fare. Unfortunately, I didn't taste anything though one of the restaurants smelled amazing through my mask! By the time I was ready to munch, I was tired and couldn't remember where the amazing smell was.
Of course, I didn't see every single store. This flea market was big.
I will return some other time and explore the other side.
Hope this was helpful!