Amazon infringement question

I probably know the answer to this already . But going to throw it out there anyway .lol Im selling a trademarked white label olive oil i created on fba . I also do some local foodfares . Is it legal to buy a product on amazon ( like mine ) and resell it on ebay or any other site . Im looking around on my phone this morning and find it on ebay and another site . (NOT on Amazon) someone must have purchased and trying to make a few bucks . I probably have no legal recourse . Maybe I cpuld put on listing something to the effect as ” not to be resold ” Any opinions would be helpful Tia