My grandpa passed away a couple of years ago and the other day I was helping my grandma sort through some of his old tools. He was a farmer and had a lot of farm type tools. One of the boxes I came across had a lot of small boxes of welding rods in it. I am wondering if these have value due to their age (probably at least 5 if not 10 or 15 years old. He liked to pick up things like this at auctions.) He had welding equipment to repair his farm implements along with creating all sorts of neat things. Do welding rods get wet from normal humidity and get ruined? They have been stored in a machine shed in small plastic boxes. I have seen welding rod ovens on the web - do welders put their rods in these for a few hours before using them to dry them out? Should I try to sort through them and list them for sale on my local craigslist or just take them to a small town welder and see what he will give me for them or trade for his services (I do need a trailer hitch installed on my car). Do these rods get old and therefore the quality of the welds wouldn't be any good? What would I value them at? 1/2 new retail price? 1/3? 1/4? Thanks for you help!