I would recommend Terapeak if anyone wants to do really good product research. I use it for my Ebay account and it has been invaluable. You can also research competitors which has helped immensely.
GoDaddy has really good book keeping software that automatically keeps track of your Ebay and Amazon sales. It makes doing your taxes a breeze.
Also if you wanna to build your social media accounts up check out Mass Planner. You can thank me later for that one.
You can also get business loans for PayPal and they base it off the income of your business. I would look into it if you are serious about 4th quarter.