Wot no Suerat?
Agree with the consensus view re entry page, frames and needing to warm up the site.
To get some sales, you need to be targeting the right people. Have you done any keyword research? If you can see what key-phrases people are using in your market, you can either optimise content or go for pay-per-click. If you do the latter, sort out your sales conversion process first and work out your average net profit per sale. Multiply that by your conversion rate (if you don't know it, assume 1% to start and set a low budget to see what happens)and that's the notional value of a visitor - not lifetime value.
Does that help?
Cheers,
Paul
http://www.incisecomms.co.uk