Old Bilbo value

Hope this doesn't break any rules. I have 2 Bilbo longboards that have done nothing more than serve as shelves for at least 15 years. They need to be turned into cash. No idea what they are worth. Don't want to give them away but at same time would prefer to sell not keep.
a) 10 foot long. Weighs tons. When I got this in the late 80's Bilbo reckoned it was mid 1960's at the latest. Balsa stringer. Pale blue hard plastic fin. Slightly spoiled with a modern leash plug. Some repairs to nose and tip but very little and the cloth is intact.
b) 9 foot 6 long. Weighs tons. An odd one this. The Bilbo transfer is slightly twisted under all the gel goat. It's where it should be but not 100% it had to be done at the time of construction but Bilbo were unsure about why it left the factory. Again dated as mid 60's. What is odd is that it had no fin. Bilbo said that just would have not happened but the cloth was clear and uncut. It now has a cut out for a fin which was roughed out of a nice laminate of mixed hardwoods in about 1990 but never fitted.
This board has 1 or two small bubbles/ separation.
Any ideas anyone?
a) 10 foot long. Weighs tons. When I got this in the late 80's Bilbo reckoned it was mid 1960's at the latest. Balsa stringer. Pale blue hard plastic fin. Slightly spoiled with a modern leash plug. Some repairs to nose and tip but very little and the cloth is intact.
b) 9 foot 6 long. Weighs tons. An odd one this. The Bilbo transfer is slightly twisted under all the gel goat. It's where it should be but not 100% it had to be done at the time of construction but Bilbo were unsure about why it left the factory. Again dated as mid 60's. What is odd is that it had no fin. Bilbo said that just would have not happened but the cloth was clear and uncut. It now has a cut out for a fin which was roughed out of a nice laminate of mixed hardwoods in about 1990 but never fitted.
This board has 1 or two small bubbles/ separation.
Any ideas anyone?