As I can see, Your domain is very New:
Results for ourdesktops.com :
Domain Created on:
September 07 2008
Domain age (approximately):
0 Months, 22 days.
Just 22 days old.. Its nice that you are trying your hands on PPC, however, with such a fresh site and with such a service, You could have adjusted the website to basic SEO Requirements..
I cannot see relevant Title Tags on the pages. Most of the landing pages do not have as much content as they desire to attract visitors/links.
The site look s all natural but not tweaked as required for SEO.. In my opinion you should
try on with Organic SEO and capitalise the benefit from the site being so new, as google gives a new website boost effect.
Along with that, Opt in for PPC campaigns but DO check the keywords you target 10 times. Getting traffic is one thing, and converting them to sales is another. Its all a game of keywords, u c..?!
Umm perhaps this , to me seems like a case of redirect.. Is
www.mailexpresso.com your website too?>?????
http://copyscape.com/view.php?o=37319&u=http%3A%2F%2Fwww.mailexpresso.com%2Fdefault.aspx &t=1222750436&s=http%3A%2F%2Fwww.ourdesktops.com&w=27&c=1
Well here are a few channels I think could do the job for you..:
1. Your Items to sell are such that you can have a high audience levels at Digg
2. Stumble Upon, .. Hmm Instead of paid ads there, write up a content, links clinching content, and then see it get stumbled all over and then getting those massive links and traffic, conversions would still depend on what you offer on the website and the levels of discounts

.
3. Adwords being another option for you, however, make sure you use proper landing pages and Keywords ofcourse.
4. Being a new website, you can opt in for a viral marketing campaign, your products are versatile enough, and perhaps stuff for free is quite possible to gather status..
5. Above all, Start to build links for the website. Most of the links are from Forums right now and sitewide.. which google devalues..
Joining all and drawing a bottomline: You need to do Organic SEO Along with the Paid options just because, organic SEO and SERPS will ensure long term SERPS.. while paid are just Pay to Play!! which requires Risk Management!