Now, now, let's not be so rough on this place. Actually, like any swap meet, the vibe changes depending on the weekend, time of year, and the folks there on that day. ---That's the best part. After all, this is working class stuff not the Scottsdale Fashion Square.
Here's some of what I saw there recently: Inexpensive (some new / some used) Tools, shoes, and clothing especially for kids, sports team and other hats, belts, wallets, old video games, laptops (if you want to take the gamble) toiletries, perfumes (cheap knockoffs and knockoffs in original bottles).
There are even half a dozen fruit and vegetable stands. You won't find a cheaper box of mangoes anywhere I know of (most of the prices are negotiable). There are chiles and spices and other southwestern edibles. There's usually a band or boombox playing Mexican Music, C&W, Rock or something lively. There's a couple of snack stands. It's only a couple bucks to get in and it's something to do on a nice day, even if you just walk around.
Or here's an even better idea, instead of holding a local yard or garage sale load up the truck and head out to Glendale and share your no-longer-needed goods and have a little fun yourself. Just get there early.
P.S. Though a little weather-worn, it's also the last remaining drive-in movie venue in Phoenix, maybe all of Arizona (Scottsdale closed last year). Sadly, I have seen bulldozers circling like vultures on nearby corners lately Now's the time to take your S.O. or the kids at least one night to experience this piece of historic Americana before it disappears completely.
UPDATE: Family night on Tuesdays. $5 Admission and $1 hot dogs. Oh, yeah!