as little as $20, $5 for the occasional garage sale find. Truth be known, you don't even need a canner for the small jobs, it's really just a deep stock pot after all. As long as the water covers the jars you're good to go for fruits, preserves and other acidic foods. A starter pack of jars is often less than ten bucks or again, available at garage sales and thrift shops for next to nothing and once you have some you can reuse them indefinitely with new lids. With everything on hand an opportunistic jar or two is well worth the effort.
an art that shouldn't be lost for any number of reasons all of which are good on their own and undeniable in combination.