Are you looking for one of the small, round, wood burning pack stoves that are under $20. This is one of the best for the money I have used.
This camping stove will burn wood or pellets and also has a small tray to burn solid alcohol fuel cubes.
Small Stove Specs:
Lightweight and compact, has minimal impact on the weight of your backpack.
Environmentally friendly: No fuel canisters, no chemical emissions, no batteries, less carbon footprint.
Unlimited fuel sources: Cook a meal using the twigs you collect on your hike or solidified alcohol. Say goodbye to heavy, costly, polluting petrol fuels.
Built tough: Made of hardened stainless steel, the stove is meant for rugged backpacking and camping.
Come in a mesh bag for convenient carrying.