If I wanted to have someone test some items before starting a shop how would I go about it?

After finding volenteers to volenteer how do the pros get the items to the volenteer testers?

I'm completely new to this end of sales.

And in addition to the above...

Are there any merchants or otherwise with any advice before one might start to sell items?

Thoughts along the line of, "geez wish I had known that before I sarted selling".

Thanks for any and all replies.

 

Scott