Don't forget to compare the mono amps also. VTM 120's are good amps too. Yes, I am selling mine. However, my point is stereo vs. mono? HMMMM. Unless the amps are fairly new, then the $2,000-$3,000 range should be the right range for most, unless they are stupidly great amps.
VT 100, VTM 120, VT 130, D400 (what about those?. Plenty around.). As I posted before, if you can find a dealer or someone that has them for sale and you can demo the amps in your home, you should do so. I know Stereo Design, in San Diego, CA has a couple of D400's and a VT 100 that they would let you take one home for an audition (with a credit card on hold).
try to listen first.