From your description a very fair price. Assuming that you are familiar with pre-'13 Elsies, can you assure yourself that 1) it hasn't been reblued and/or recased, and 2) that the LOP is correct OVER the pad?
Remember, standard LOP varies depending on trigger position---- 13-1/4" for a rear position trigger, 13-3/4" for a mid position, and 14-1/4" for a front position.
The pad isn't a major issue--- there are period repro pads available.