Hi. Quick query. Pet shop on high street. UK England. If I find dry goods online (like eBay Amazon AliExpress) cheaper than what my suppliers charge me, can I buy online and resell in my shop. There’s a water test kit in question my suppliers all try and charge me £28 before tax. I can buy it on amazon for £15.... What legal hoops do I need to jump through? Sorry I’m still new to all this just sick of getting mugged by wholesalers.