Hi, I am planning on buying a few packages of BG 80 online instead of paying for it from the stringer, so just paying for the labour cost, as that would end up much cheaper. I would just like to ask how long do unused strings sitting in their packaging, or reels last? Does the string actually degrade just from age, or is it completely fine sitting in the sealed package? Then, would there be a difference between separately packaged strings, and reels? Thanks in advance for any help you can provide!