I assume that the furniture is stock TC stuff.
If so, then the pistol itself is worth $450-550 depending on condition. You could probably add in $25 for the scope base.
As for the scope, it really depends on the make. If it is a Konus or other cheapy, just take it off and call it a day. If it is a Burris or Bushnell, then figure about $75-100. If it is a Leupold, then $150-200.
Those are "fair" prices. At the end of the day, you can ask whatever you want for it. Whether it sells or not is another story.
Titus 3: 4-7