I've had 12 domains up for a month and not even one of them got a single pageview yet is it just this hard to get noticed on the site, or is something else wrong? I just have the standard account.
The amount of people that sell domains on sedo means your site will be further down the page. To get it on the first page for your niche you can pay Sedo, something like 9 euros. Not sure if that works as i've never tried it myself but thats an option I guess.
Unless you have a top-notch domain name, you're not going to get noticed on Sedo. I've had my domains parked there for a couple of years and never got a single penny from them.
I have used sedo for about 5 months and had just one sale through it for $250. now have 57 domains on sedo but its fairly pointless
You may try featuring your best domain at the Sedo homepage for $39 or start first with the category feature for $9. These are the steps for your domains to stand above the millions of domains listed there.
sell them through your own site or blog. put up a page and list them, if you get traffic to your sites, then this might work for you. try it. also try what the others above have mentioned: ebay, dp, other forums.