Hi Shlomo and welcome to the forum,
Regarding your first question, all of the suppliers in our directory have been fully verified, so you can be confident in dealing with any dropship supplier you find within our directory.
Regarding your second question, dropshipping most certainly has its advantages, but price usually isn't one of them. You have to remember that you are going up against sellers on sites like Amazon and eBay that are buying in large wholesale volume and then selling on a very tight margin, you can be even going up against wholesalers themselves selling direct to the public through these popular avenues.
So you are going to find markets where you just can't come close to competing with a seller on a certain product using a dropship model because of the sales model they are using.
The trick to dropshipping is to chase markets that aren't dominated by sellers using a wholesale model. That's where market research is key, finding those holes in the market that you can exploit with a drsopshipping model
You may also find this link helpful, it's all about using dropshipping to your advantage over a wholesale model to give you a competitive edge..Link hidden: Login to view