Which is good because I bought one of the smallest ones - almost 16 lbs ($2.38).
I haven't broken it open yet, but they looked interesting. There's something about Charleston Gray watermelons. Here's some links.
"CHARLESTON GRAY WATERMELON was developed by C. Fred. Andrus in the 1940's and put into commercial production in 1954. Bred to provide market growers with a disease-resistant, easy-to-ship product because of its hard rind, it is high in soluble sugars -- what gives watermelon its sweet taste -- so does not sacrifice taste and pure deliciousness ... Although not seen much today, it was the basis of almost all of the hybrids currently produced in the market. The long cylindrical green fruits average 28-35 lbs have a sweet pink flesh and large black seeds - perfect for any backyard seed-spitting contest!"
"The classic oblong watermelon, Charleston Gray has red, fiberless flesh and a tough, medium-thick gray-green rind often used for making watermelon rind pickles. At one time this was the predominant watermelon in home gardens and markets. It is not a seedless variety. Grow this one for seed spitting contests"
"The bright red flesh is crisp, sweet and delicious"
Sorry for reporting before I tried it, but I won't be cutting it a for a few days. It could be a bust, but everthing I'm reading about it looks promising.