Roseville Vase #784-8

This Roseville vase has always been a favorite piece of mine. My mother
had purchased it at a yard sale years ago, and when she passed away I
kept it. I loved the stylish lines and the cream color, and mostly because it belonged to my Mom. It must have been a pair of these but I guess there was only one. It's made in the USA and is numbered : 784-8.There is also a blue mark on it that looks like a J on the bottom. I'd like to know what it's worth.

Thanks,
Theresa Grabiner