maybe?
What becomes subjective is the install and the design. Every saber is going to have parts (board/battery/LED/hopefully a chassis). the hilt also might be simple to price if it's MHS, a common replica, or priced from a run. What would complicate the estimate is if it was a one-off, who did it, who wired it, and what are comparables. It would be interesting to see an "Antiques Roadshow" section, but it could be contentious. Say, a Yoda or Harp Graflex, or a custom Axis or K3GR1 would be worth something more depending on the audience. I saw some joker saying that $1000 for a saber is ridiculous, but then I thought of AceRocket's un-named copper hilt and laughed to myself.
you might be able to give a ballpark range, but even that would be tough.