I almost wish I had not seen this post, it generates too much envy!
You obviously got an unbelievable deal on these revolvers. Either one is worth much more than you paid for the pair. The serial number you posted indicates a 1966 manufacture date. In normal model 27's, the S prefix increases value and the 5" version is the second most valuable. You guns are far above normal and should be treasured. Keeping them unfired will insure that the value continues to rise.