I love Walmart. :D Our fabric department ladies are awesome.
Mostly, I buy garment fabrics there. I get really nice stuff for $2 per yard and the outfits last for years. I am really bad about discarding clothes... just yesterday, I realized I was wearing a dress I made nearly 20 years ago -- and I bought the fabric at Walmart.
I wish they had more knits, though. My 2nd DIL likes her maternity clothes in a very thin knit. I bought the two prints they had, and they haven't had any more in yet.