1986 GSXR750 GSXR1100 Fox Shock

First of all, most of my vintage knowledge is more along the lines of Nortons or Ducatis. I have very little knowledge of vintage Suzukis.
This shock came to me with a bunch of other early GSXR parts many years ago. Time to clean out the garage. I think that it is a Fox but can find no identifying marks other than a date of 03 87 on the top clevis and in general appearance it looks like a Fox. Eye to eye length is close to 11.25" . It has an Eibach spring marked 700.225.350 and has what seems to be a date code of 7/91. I can put the spring in my rater if you would like for me to measure the rate.

Does $175 sound fair?