Those companies buy natural gas from suppliers and resell it to their customers.
From the kentucky.com
They may not even like the music, but they will resell it online or at auctions.
From the charlotteobserver.com
These traders consequently resell the milk powders to other countries worldwide.
From the hemscott.com
Mr. Reed figured he could resell them to a friend who owns a Western-wear store.
From the online.wsj.com
Many of them must scavenge for food scraps to eat and discarded items to resell.
From the orlandosentinel.com
He pointed to businesses that resell clips for use as ringtones, emoticons, etc.
From the variety.com
Jean bought all the buttons in the store and came home to Denver to resell them.
From the denverpost.com
Oh, but the demolition contractor did save a few bricks to resell to collectors.
From the sacbee.com
But, says Gozzo, designers aren't able to resell these creations as mobile apps.
From the techcrunch.com
More examples
Sell (something) again after having bought it
A reseller is a company or individual that purchases goods or services with the intention of reselling them rather than consuming or using them. This is usually done for profit (but could be resold at a loss). ...
Hosting accounts may not resell web hosting to other people, if you wish to resell hosting you must have a reseller account.