Have Judi's Pastime Clowns...need to sell

Hello everyone,
My mother was a collector of these clowns and has recently past away. Anyone know WHERE to find out how much Judi's collections are worth?
My mother knew Judi when she first started her clown creations. Iw ish I would paid more attention back then.
if anyone has any info...please contact me to point me in the right direction,
Many many thanks
Michele