Old and used up, but cheap. My 20'CC was a freebie. It was old and rotten but that didn't stop me. I'm serious. Let me know unless you are just hell bent on seeing how fast you can chop her up. In which case I think it would only take a six pack.
Four cold ones to get the saw running one to cut her up and one to reflect on the great service the old girl gave you.
BTW- If you start to tear up you can blame it on the fiberglass..