I have a 1992 Stump Comp. And I like it too. Choice of selling either this or my '97 M2 Stump Comp, and the M2 is gonna have to go.
Yeah, I think they were around $750-800 new in 1989. I have a Bicycle Guide with a review of the Stump Comp from that year, and I remember the price being $950, I'm pretty sure.
Also have a BG or Bicycling with a review of your bike(in Ivory/Burgundy, the same color as my 1989 Sirrus), but don't recall the price right offhand. But somehow, $750 seems right to me.
Nice bike.