There are a lot of moving pieces in an Internet business  and you need to get all of them right.

Whether you wish to sell ads related to your content, or join an affiliate marketing program or sell your own products on eBay, you will need to make a lot of right choices all along the way. The way to do this is by testing: testing ad placement and color, testing content, testing product categories, testing various suppliers and vendors, testing affiliate marketing programs to see which ones work for you.

Those who take the time to test everything they are doing are the ones who become successful whichever field they choose.

Mom-and-pop team Cheryl and Gary Casper started small, like many do on eBay, first looting their own garage, even snatching up VHS copies of their daughter’s Cinderella and Sleeping beauty then moving on to sell their neighbor’s cast offs.

As they learned about online auctions and particularly the eBay environment, the Caspers moved on up the selling food chain.    They now sell $15,000 to $20,000 a month in goods on eBay.

How did they do it?  Trial and error.

After their home started overflowing with neighbor’s cast off products, the Caspers turned to drop-shippers--companies that charge others to sell their products then ship directly to buyers. Although this looked good at first – removing the risk of buying the merchandise, the inconvenience of storing it and the hassle of shipping it—there were definite drawbacks. The Caspers were selling about 40 TVs a week but about half of those arrived damaged at the customer’s home.  The Caspers needed more control over the quality of the product which was shipped to the customer.  They also set out to identify a product category which was less crowded and more profitable than electronics on eBay.

The couple used eBay itself as a research tool, and began going to Chamber of Commerce meetings to find people or companies with products to sell.  They discarded many possible products including Star Wars light sabers and gumball machines.

Ultimately the Caspers decided on auto floor mats, an item with as much as 75 percent profit margins, even after paying the dealer put.  The Caspers put as many as 50 mats up on eBay, at $16 to $125 each. Once or twice a week, They buy the mats they've sold from a Houston-based auto surplus company.

"If I only wanted to make a few hundred dollars a day, I'd be done by noon," says Cheryl.

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