Advice: Where Best to Sell Niche Nutraceutical Site?

I'm considering selling my niche (single product) nutraceutical site founded in late 2005 which did over $30k in revenue and nearly $15k in profit in 2006... and growing. Takes one person about 30-40 minutes a day, 5 days a week to run (mostly just packing and shipping orders). Product is sleep related but has very distinct/niche target customer base. I will certainly post the details here when I compile all the metrics... (ex PR5 homepage & there's related content on the site yielding 800 uniques and 2000 page views daily)

I was wondering where else you would recommend advertising a small, profitable and growing nutraceutical site for sale?? Thanks.