Sometimes Sam's club watermelon is cheaper than the supermarkets but sometimes it's not. Almost without exception though, the flavor and texture (red, not watery, not full of seeds) of the ones from Sam's club is a higher quality. I have noticed Walmart ones are $2 cheaper now (same parent company), which is a little disappointing but as I haven't tried them, I can't compare. Still, I am guessing Sam's is a $2 premium but I've really liked the results.

First bad watermelon I have bought at Sam's!

The melon had no taste whatsoever!

Watermelon so tasty and super sweet

Watermelon looked good on exterior

It was over ripe water melon, had to throw it away

Watermelon was texture was soft as if the melon had been frozen. Uneatable.

Out of season and poor quality. Can not eat.

The prices are too high and the watermelon doesn't taste good

Not edible melon was terrible