We did take the trailer the first year and one other time - we realized that we could only set up one lathe with the room that was available and decided that it was easiest to just make our presence known than to set up and demo.
Allow me to suggest three books you may want to look before you decide to buy them.
Making Toys that Teach by Les Neufeld - ISNB# 1-56158-606-4 (2003)
Making Heirloom Toys by Jim Makowicki - ISBN-10: 1-56158-112-7 (1996)
Wooden Toy Manual by Richard Blizzard - ISBN# 978-0-85733-220-2 (2012)
Very good, Willem!
Not too sure on how to price it but if it's for a charity or a charity auction - either talk to the organizers or put a value on your time and materials and tell the charity that is what you value it at.
Some museums that specialize in period furniture are always looking for antique pieces of furniture. You can always do a little research into them to see if they are interested in what you have.
As for most antiques, unless you know for sure that someone in your immediate family is interested...