First, check out this video that explains why you need to use Doba. I used a friend of mine's YouTube video about Doba as he explains it perfectly, check it out:
I hope the above video helped explain just WHY you need to use Doba...but if it didn't convince you, I hope that I can. Doba allows you to sell products online WITHOUT having to set up accounts with numerous suppliers. All you have to do is sell products, log into Doba and then purchase those products for your customers. You don't deal with anything except for order processing! How much easier does it get.
Now take a look at this sneak peak of Doba from my friend again. He did such a great video, there was no need to make another. Check it out: