Would value anyones knowledge here.

I'm looking to sell a single product via a website, advertising it by web optimisation on google/ ask etc.

The question is, do I have to initially have buy in the stock- to forward it to the consumer,

or and preferably

are there 'virtual' type warehouses where if someone orders from my site the product can get sent directly from the warehouse- therefore obviously cutting down initial start-up costs.

Thanks in advance.

Tim