I inherited my dad’s 1972 CZ 250. It’s yellow with that porcupine looking head. I’m writing this from memory because I don’t have the paperwork in front of me at the moment. He raced professionally in late 60’s early 70’s. The factory sent him a new bike every season from Europe in a crate ( I do have the original bill of lading). To get a new one every year he had to return the previous one. When he retired he kept the last one (72?). He left it in the crate until about 2006. He put it together and hung it on the wall in his living room. It’s never even had gas in the tank and has never been outside. Any idea on it’s value?