This is what a $15 stove looks like

Here's a good example of a $15 stove. Old, dirty, but not rusted. Parts inexpensive and easily available.

It's a 413G which makes it a 1960s stove. The original manual for this kind of stove is online at Coleman (pdf) and has delightful graphics.

This kind of stove makes for great camping (NOT hiking, it's a called a "suitcase stove" for a reason). Also nifty for cooking stinky foods outside or canning. Or, for you all-electric folks, cooking anything at all if your power goes out. A camping stove means you can cook no matter whatever else happens.

Don't buy this three-burner

Seller has been trying to sell this 3-burner stove for about a month.

Two problems:

1. $45 is too much. A three burner goes for $25-30.
2. this particular one is in bad shape. It's been left out (rusted) and has been set on fire once or twice. It's common to see burning on the underside of the lid. Burnmarks on the top indicated the conflagration lasted a good while.

Don't buy it. If it were $20 you might get it, tear it down, and respray it.