The super W-M near me has so-so fish stock. A little better than average but still rather poor. What peeves me the most is how generously they stock baby large fish, oscars especially. I -know- at least 90% of them will either...
1- Die while still in the tank,
2-Die shortly after being purchased by an ignorant/new fishkepper or
3- Live to an adult, but deformed, HITH-ed, and in a undersized tank.
Some Walmarts may have certain fish cheaper, etc, but I generally don't buy from them because I'm supporting their whole fish department. If I find a W-M with an excellent and honest fish department, then I would support it ( someday, maybe, far away....)
I got into fishkeeping by purchasing a cute baby oscar and, of course, I had 10g. I didn't know anything about water quality, etc, and the fish died shortly. A month and hours of research later, I realized the employee that told me 'they get 'yay' big ( he stretched his hands to about 5") and are good fish' was a moron and/or heartless sellout. Eh, sorry about the rant...