Your plane looks like the Stanley #78. Stanley's were made from 1884 to 1984. The Craftsman logo looks to me like 1940's, 1950's vintage. Are there any casting codes stamped in the body ( it could be just one letter)?
I see both the Stanley and Craftsman planes like this for sale quite often, but MOST are missing the adjustable fence.
I would watch e-bay (type in Craftsman plane) to get a feel for the value.