I recently purchased a lot (or, alot  #@rofl3) of Coleman Sport Cat catalytic heaters. Six to be exact. 


While it's no Mr Heater Buddy, it will take the chill off a tent or a bus. 
I tore each one down and checked for damage and reassembled. 5 are making heat! 

(#6 looks like it had a handle bag melt on it and it's covered in burnt plastic  bawlin)0 )
4 3 are available for $15 each (essentially what I paid for 'em)  
Since I am no expert nor do I have the equipment to test for emissions,  
I have to sell these as parts only, use at your own risk (as I will).
PM me if interested