Do not sell any brand name label merchandise without a license. I know people do it all the time. But, for example, the feds finally got around to busting some individuals in Derry, NH this year for selling "knock off" merchandise and they face hefty fines and imprisonment. That's a slightly different matter, but, selling branded merchandise without the license from the designer/manufacturer also carries liabilities.
This answer is provided for informational purposes only. Actual legal advice can only be provided in an office consultation by an attorney licensed in your jurisdiction, with experience in the area of law in which your concern lies.