Well, there is a bit more to the Coleman story.
Ture is correct according to my information on Coleman stove current outsourcing. But there is a bit more to the story.
My understanding is the stoves were outsourced to China, but for some reason maybe transport cost increases or bad quality, some at least were brought back to manufacture in the States.
Coleman like most USA manufacturing is run by accounting types, who will almost always go for the lowest cost they can get by with no matter what. Harvey Partner is a craftsman with a history of doing things right and it shows in the quality of any thing coming out of their shop. Coleman Items built at the lowest cost or Partner Steel items built with pride, quality and the best the craftsman can do. Back in the old days Coleman was local and had pride of construction in their gear, you can see it in the stoves and lanterns they have on display in the company store in Wichita. Worth a visit just to look.
I own a couple of the very old Coleman green stoves, so old my bet is they were made in the USA. One is propane only has the sear's roebuck logo on it and the other is a classic Coleman square green one that burns white gas. Cooked a few meals on the propane and a lot on the white gas. Other than having to jack around with the white gas, and the smell of same, the white gas has been good to go on car trips but I never took it on actual get wet river trips.
Coleman stuff according to the Eagle has a lot of it's manufacture off shore and it shows. If you go to Wichita to their little Coleman Store you can also see a line of close too expedition quality stoves, tents and sleeping bags. I have a good paddle bud that uses Coleman tents all the time and he sez they work.
Any thing mechanical can be destroyed by poor maintenance or kept longer than normal by good maintenance.
Bottom line for me is yup they are expensive but the Partner Steel stoves are the ones I see most often in long time use by major river outfitters who understand the need for good gear in the long run.
Again, you can pay less for a Coleman or some other general use stove and maybe use it for a long time. Or, if you want a very good chance for long term durability and something that works well under bad conditions - go with the Partner. Your money your choice.