Oil on canvas

This is a picture of what looks like a bearded old scholar wearing a round hat. I believe the signature reads Schaepman, but i am not sure of all the letters. It is signed in red. It is approximately 10x12 and is in a big square frame. Someone else brought up the same artists name, also written in red on this forum. The picture they included is similar to the style of my painting. I have included a link to the other painting below

http://www.instappraisal.com/antique-appraisal/oil-painting-canvas-4

If anyone has any information about this artist, or how much it may be worth, i would appreciate it!!