"try this one for 7 smackaroos?"
This whole attitude of the cheapest product is perplexing.
Stove fuels store a lot of volatile energy. The have the potential for disastrous consequences. I bought my first stove in 1972. Over the years I have used white gas, butane, Iso, alcohol and solid fuels. I have never had a mishap with any stove. But I follow the instructions and perform recommended maintenance. I researched every stove I have ever purchase. I am not afraid of stoves, but exercise diligence and care.
When choosing a stove, or any other piece of gear, I research the available products with an eye for the best quality and functionality for my needs. Price becomes secondary. If it exceeds my budget, I save my money.
How do you know an unmarked, unbranded stove is made by a known and reputable company? If it was made by one of those companies, why would they not brand it? How do you not know it was not a stove that failed the inspection process and was thrown away, only to be retrieved and sold by some unscrupulous person? How do you know it was not built by some guy in his garage with inadequate knowledge, materials, or equipment? HOW DO YOU KNOW?
I research my stoves and purchase from companies with a good track record and an excellent reputation to protect. Not a 100% guarantee, but much better than a crap shoot with a stove in a plain white box.
I think one would be foolish or stupid to risk their lives on a $7 stove of unknown origin. Of course I find those ill-informed consumers, who do not research products, and are always shopping by price alone are the first to demand "someone" resolve the problem and compensate them.
So if your $7 stove blows up in your face, you'll get no sympathy from me.
If you want a good stove at a good value then wait to buy a brand name on sale or clearance, or buy a used one on eBay… but make sure you buy a maintenance kit for your used store, read the instructions carefully before using it.
There is a reason someone coined the term, "Buyer beware."