Value of an Antique Wooden Bed?

I have a full size wooden antique bed. The side rails have a bolt/screw to connect to footboard and headboard. There are no markings from the manufacturer; only stamped with a number 45 on lower headboard. It was purchased in 1999, but has been stored (inside) for the past 15 years. I am hoping to get an idea of the value to determine whether to sell or give to charity.