As one of its daily deals, MidnightBox offers this Portable Outdoor Gas Camping Stove
for $7.95 plus $3.99 for shipping. That's the lowest total price we could find, outside of the mention below, by a buck. This single-burner stove converts straight gas cans and features a copper inner core and three collapsible legs. Deal ends today.
A close price: Crazy Cart via Amazon has it for $8.39 plus $3.99 for shipping.
Update: As a reader found, Etekcity via Amazon offers a similar one for $10.99 with free shipping via Prime.