lou hit it on the head.
you might have other options, but besides Ebay, there isn't much, (ebay is worthy of consideration, but the fee's are pretty high, which would make using a consignment lot worthy of consdieration as well) I remember searching for reasonably priced options before, but CL and BT have the corner on the market, the other sites that I found had so little traffic it was embarrassing. you might want to check with your local news paper, some people still check those...
with that said, I don't really think CL buyers are looking for garage sale prices (steals & deals) I think the regular joe looking for good product, good price is there as well.
ps.. i've sold a lot of ski's / cars and a boat in the past 2 years...
The one thing I forgot to mention, either park it in a bank parking lot over the weekend on a busy corner (just leave your car there with it) or put a for sale sign and drive it around, I sold one of my ski's by parking it with a sign in the yacht club parking lot, figured that had the highest concentration of boat owners in my city. Many people think selling a ski/boat is easy, (list it on CL and wait for the phone to ring) but I remember having to put a dam lot of work into it, used to tow it with me to the grocery store in the afternoons, weekends, listed on BT a couple of times, used the local paper, and parked them on weekends. ps... keeping it minty clean is a key as well, most other sellers don't, so your's will get recognition for being spotless., and will sell faster