ThermoWorks typically offers volume discounts when you purchase 5 or more of one item.
Their Mix and Match Black Friday Sale allows you to get the volume discount by purchasing just two items. It's worth noting that you can pick two different items to get the discount.
Favorites such as the Thermapen - RT600C - and ChefAlarm are included in the mix along with a bunch of other Thermoworks gear.
Check it out - Here