The Internet is the fastest-changing marketplace on earth. Million-dollar ideas from one year ago might not generate a single penny today. And the best search engine optimization strategies from months ago may be completely invalid now.

But this doesn’t affect the best Internet entrepreneurs. It only hurts the one-hit wonders. In fact, it is what separates the top sellers from the struggling sellers.

Most of the struggling sellers rely entirely on the information they get from ebooks.

The best entrepreneurs know that you must be able to conduct your own analysis if you want to stay on the top. Books and courses can help you get there, but ultimately, you must learn how to conduct your own research.

Now, you can spend hundreds of hours and dollars researching this for yourself. Or you can purchase a service that does this for you.

Or, if you’re looking to start your business on a shoe-string budget like most sellers, you can simply use the top-sellers’ examples.

Start by going to Ebay.com and searching for something you personally sell in your store. For example, if you sell stereos, search for stereo.

Take your list of results and use it to find successful sellers. Look for powersellers, sellers with stores, sellers with large inventories, and sellers with a lot of positive feedback.

Look at these sellers and try to determine the exact methods they use to make sales: Do they use templates? --If so, how are they constructed? Do they use a lot of pictures? Do they use ad copy?

What words did they use in the title? Is there a subtitle? Is it featured? Is it bold? What date and time did they list it? Is it part of a dutch auction?

Does the seller own an Ebay store?--If so, how is that store arranged?

Does the seller get the majority of her auction traffic from Ebay or do they advertise somewhere else?

How many items are in the seller's inventory? What price ranges do their auctions span? How do their prices compare to yours?

Does the seller  purchase their inventory from another Ebay seller?--If so, can you also use that seller to stock your inventory?

There are dozens of questions you can ask and corresponding answers for all of them. You must determine what you need to ask--and then use the reverse engineering method to answer it.