Looking to buy product in bulk to resell?

I have a massive heated shop that is now empty due to myself discontinuing my woodworking business. The shop is now empty and I'm looking to buy some sort of product in bulk to resell. The item(s) could be as small as an iPhone or as large as a car. I have the space for anything really. What are your guys suggestions? And I'm looking for a source to buy this product in bulk. Any help is much appreciated.

I spent 3 hours looking for Advantage for cats at a low price.
Can you find it for $4 a vial?
Then you can resell for $7 a vial.
That would beat all you other competition and you would be a billionaire.

In other words. Find something that is in demand. That people want.
And sell it cheaper than anyone else including shipping.

Just having the space alone may not be reason enough for getting into such a venture, (just sub-letting the space might be the safest bet) you probably need something with a high markup potential, I understand those selling iPhones on ebay have razor thin profit margins, due to competitive pricing. Something not requiring fancy retail store appearances may be selling liquidation goods, some larger businesses in this field hold auctions for select items.
There are outlets selling "surprise package" crates of merchandise dumped by retailers that may be customer returns, last years fashion, excess inventory of a particular size, etc.flea market sellers load up their vans at such outlets. Here's one example: thecloseoutnews.com
Some ebay sellers use a service like WorldWideBrands.com a membership site offering a directory of "certified" wholesalers and drop shippers.