Anybody know of a website thats for sale ?
Your best bet is going to webmaster and domaining forums, there are tons of private sales that happen every day there.
I would start with dnforum.com ...
you can also try flippa.com although that marketplace is competitive so not many good deals unless you have a value added opportunity like private advertising or affiliate deals, or some experts at conversion optimization...
The way I find domains is I look for undermonetized websites that have age and strong backlinks, and rank decently for high margin high volume search terms, but have simple SEO fixes that can easily double the search traffic. For example if it ranks for the root keyword but not for long tail keywords...
(i.e. it ranks for mesothelioma attorney, but not for mesothelioma attorney new york) and with simply adding an optimized local directory, I can eat up tons of long tail search traffic...
another trick is to run google searches with specific queries that a website for sale might have on the site (i.e. "this website is for sale" or "make an offer" or whatnot... you have to get creative...)