I keep having problems with sourcing. I will find profitable brands, make a few bucks, and then get hit with a cease and desist. I would try to become an authorized seller If I knew how but I figure the brands only work with big stores.
Most analysis tools indicate if there are problems with a particular brand. Just make sure to check before buying and you should generally be ok.
I used SAS but BBP and other tools should tell you and there are some lists around you can check against. I think FastTrackFBA have a list.