TO CHEAP.. figure what your time is worth. You would be giving your cutting boards away and selling your time to cheap at those prices. But if your happy with the return on your time and materials at that price by all means sell them for that.
In 8th grade shop class I made one similar with maple and cherry and it toll more time than 50$ worth. I gave mine to my grandmother. I would like to know where it and several other things I made them went after they died.

May have got thrown in the dumpster, you would not believe all the crap I pulled out of the dumpster my aunts through away. It blew me away how no one else knew the history of everything in the house. Like the dinning room table buffet and cupboard were my great grandparents before it was my grandparents( it's mine now)

My money hungry aunt even sold the nazi uniform my grandfather brought back from ww2 for 1500$ she probably sold his uniform also. I didn find out about that tell after the fact. ( we don't speak now due to other similar money issues and how my grandmother was treated)

My uncle used to make some like thet back in the nineties and checker boards.dont remember the size but I think he got 50.00 a piece back then.by the way you did a fantastic job you should be proud.

I've read some studies that you shouldn't sell cheap. Put an unreal (to you or me, that is) price on it, and it will sell, especially at a craft fair. If you put 10 bucks on it, folks will just think it's a piece of crap, and not buy it.