Our Small Biz Shop Needs A Makeover… and more.

Are there “amazon certified” companies, contractors that can assist us in cleaning-up our shop? Or, can anyone here recommend a trusted 3rd party? Obviously, we can’t just ask “anyone” claiming to be reputable and experienced. I understand Seller University is a great tool, I just need help as I also work a full-time job and a part-time 2nd job.