[Linda Buquet]

Actually I think time is the wrong thing to look at. It's the number of clicks combined with the conversion rate that tells the story. How fast you get to profitablilty or knowing if a campaign will work depends on how many clicks PLUS how good the conversions are.

"P.S - My previous website gave me those 3 sales in about 2 weeks. I personally think that it shouldn't take this long."

How many clicks was that?

Most people say you need to give a campaign anywhere from 100 - 500 clicks before you can know for sure. Depending on the keywords, competition, your ad, landing page and your bid position you could get 500 clicks in a day or a month. And depending on how good you are and how well the merchant converts you could make 10 sales or 0 sales. That's why time is not as important as a wide variety of other factors.

Really too many variables to give you a very good answer. That's why testing is so important and you can only test with PPC if you have the money to work with.

I recently blogged and posted about an article that would help you out on this. Need to find it later. Don't remember where it is.