You can post your ads for free at http://www.zikbay.com. Visit this site and you can have your own free online store!

Advertise accordingly.

Do some keyword research on a topic that interests you and see if there is a untapped market out there for your product. You can do this by getting a keyword tool like Keyword Discovery and use your keywords in your Google Adwords Campaign. The key is to find cheap traffic from relevant google search keywords and creating a site that attracts sales and collects information from those interested in your product.

Have you looked into Affiliate marketing. Sell other merchant’s products and receive a hefty commission.

Learn more about this avenue at our website:

We provide free information and tools that will help you make a choice that works for you.

Articles on:
Affiliate Marketing
Information Products
Website design and optimization
Blogging
Generating Traffic and much more…

Check us out at http://www.youronlinebusinessheadquarters.com

We also have several free eCourses available for download at http://www.youronlinebusinessheadquarters.com/ezine

For a great read on Affiliate Marketing check out the “Super Affiliate Handbook” http://youronlinebusinessheadquarters.com/tools-and-training/

Runner1,
I apologize. I do not understand the question fully. Are you trying to decide on a niche for yourself or are you trying to locate or find out how to position yourself in a certain niche. I will check on additions made to your post and edit my answer accordingly.

BEST WISHES!