英国采购需求：喜来芝、喜来芝树脂、喜来芝增强能量、喜来芝和免疫支持、喜来芝抗衰老、喜来芝认知功能

I'm interested in purchasing shilajit resin and would like to know the pricing specifics for 1 kilogram of it. Could you please provide me with the cost, including information on any available discounts for larger orders? Additionally, I'd appreciate details on your shipping options and estimated delivery times, as well as any quality certifications or testing your products undergo. This info will help me make an informed decision. Thanks!