Question for the roasting experts

[Stevez]

I bought a couple of 5 lb bags of green coffee beans from Sweet Maria's two years ago or so. Tried roasting and was disappointed with the results after 4 or 5 attempts, so I kind of let it go. My question is that I'd like to try it again and am curious if the green coffee beans would still be good. They have been stored in a dark area in the same bags they came in. Anyone have an idea what the shelf life is of raw green beans? Thanks. Steve