Concert ticket worth

Today I found an old 1964 Bob Dylan concert ticket. It seems to be pretty mint to me, no bend marks or anything, just a rip on the side that shows that whoever owned the ticket went to the show. It says: December 4, 1964 - 8PM Peterson Gymnasium San Diego State College SDS Facility, No. 1905, $2, etc. What is the worth of it or where can I find the worth of it? Couldn't find anything on google or ebay.