note Try the Columbia Whitewater Paddlers FB group
There are usually a few boats for sale in Columbia and you might be able to find something without driving too far. You'll probably have to throw up a post though, since it's more of a general discussion / community / smacktalking page instead of classifieds.

If you find a boat, happy paddling on the Saluda. It's a great place to build skills and paddle regularly with a good crew, plus amazing play when the water is high.