Does anybody have any suggestions on how to go about purchasing storage lockers without a place to put the items I purchase.

Can I just rent the locker for a week or so and sell the items on craigslist and have customers come with me to pick them up at the unit?  I really dont know the rules with storage units if I have to actually take the items to sell even if I purchase a storage plan until I successfully sell or clean out the locker.

Any advice that you have to offer will be greatly appreciated.  Would love to start doing this as a hobby, but not sure if its realistically possible without a storefront or place to keep the items I buy.