Welcome to SaleHoo, mymoney2!
It is pretty hard to say that this one particular product or products is/are the selling like hot potatoes on eBay. You must know that product demands may vary due to certain factors such as the time of year or season, trends and needs...
Currently these products are the most searched for: wii, iphone, ipod, ps3, ipod touch, laptop, xbox 360, coach, digital camera and coach purse.
I would suggest you try doing either of the following:
1) Check out the popular searches and most popular products on eBay:
Popular searches: Link hidden: Login to view
Best selling products: Link hidden: Login to view
eBay pulse: Link hidden: Login to view
2) Perform completed listings searches for products or brand names to see the conversion rate and average selling price. - To do a completed listings search, simply click the Advanced Search button next to the main eBay search box. Enter your search keywords as usual, and then check the Completed Listings box. Hit search and you'll see historical data for the previous 30 days. Successful items are in green; unsuccessful items are in red.
Sorry to disappoint you, I'm not too sure any of our members will readily share their coveted suppliers as this is a key factor to their selling careers :) But if you let us know what product you are interested, we'd be more than glad to help you search for suitable suppliers.
Hope this helps. Cheers :)