Definitely check Craigslist first. I was cruising through the CL and found a guy who turned out to be a member of MFK, so you know he's cool literally 7 blocks away selling Malaysian Driftwood. I ended up buying 3 pieces for my 20g long for only $20. Less than what he was asking in his CL' ad.If it's so small for an exorbitant price, take the fact that you went away as a Sign, and check out CL or free-ads or something. You can guarantee that the minute you buy it, you find something better.
I'm kidding about the Sign thing...but I would check around before! If you've already done this and I'm just really slow, sorry!