Hi,
I thought I'd just make a brief article explaining newcomers to the world of business.
What are suppliers?
First of all suppliers are companies or individuals (like myself) who can provide products to resellers.
What are resellers?
Resellers are again individuals or companies which sell products which have been provide by there suppliers. The most common place to reseller products is obviously eBay. eBay is a huge online market place where buyers and sellers gather to purchase and sell products.
Can I become a reseller?
Of course

Anyone can. That's the good thing about being a reseller, anyone can become one. But to sell online you'll need a lot of experience on how to sell, what to sell and why you should sell.
Where do I find suppliers?
Suppliers are flooded all over the Internet. Most business forums (like this one) provide suppliers. It's your job to make sure their legit and trustworthy. Directories are another common place to find your suppliers. But I advise you not to buy memberships just to get for suppliers. Most of the time it's not worth it.
Is my supposed supplier legit? How can I find out?
You can ask us experienced traders for our opinions which I can tell you helps alot
How can I 100% be sure that I won't get scammed
When finding a supplier there are some key points to look out for:
1) Does the price seem right?
2) Is their contact information right?
3) Is their website well presented?
4) Do they look to good to be true?
5) Do they offer safe payment methods?
Where can I sell?
*eBay
*Your own website
*eBid
*Amazon
*Gumtree
Those are just a few examples.
If I need further help, what can I do?
Again you can ask here.
Hope this helps.