ebay product needed

Dear all, I saw some people sell products with cheaper prices then the prices on official website of those products's supplier, selling in US with US' suppliers. I do not understand how. Perhaps, the suppliers give those seller discount for the products? If it is right, someone pls tell me how...

I've been on eBay for over 3 years, my eBay account is clean with 100% Feedback rating and over 720+ Feedback. I'm looking for a joint venture or drop shipper to sell a genuine product in bulk. If interested please respond to post with your email and what you have to offer, and if...