I have long been a fan of "Two Buck Chuck's" wine from Trader Joe's. In fact, I used to buy it when it was only $1.99. So although prices invariably go up at some point, I was quite disappointed when it suddenly sold for $2.49. Still it is decent for such a cheap price, although I honestly don't buy it nearly as often as I used to simply because of principle...also because I like a good moscato and TJ's doesn't have one in the inexpensive variety.
I do shop at Walmart sometimes, and I've seen that their cheap brand is Oak Leaf Vineyards although I hadn't tried it. I figured it must be pretty bad. But I finally tried it recently, and I was wrong. I bought the moscato, and it was actually good. I could taste distinct flavors, and it was only $2.39 a bottle.
I am pleasantly surprised, and looking at their website, Oak Leaf Vineyards is a medal winning winery in California. So you may want to try their wines, if you haven't already. You can't beat the prices and you might also find a new favorite.
