Hi Mr. Galusha,
New member Greg here.
I'm in the same boat as you just were, though the reasons for considering selling are different. I purchased a pair of LNPA-150'a from Dan back in about '01 or '02. Two years ago I had Dan to do the Vishay upgrades, which in reality is much more than just a few resistor up-swaps. Dan put in new caps, wiring, a slew of better components, etc. Considering how great the amps were prior to the upgrade, it's pretty difficult to describe how amazing they are now....
However, I've pretty much exited the audio scene for the most part, having sold or in the process of selling most of my gear. I am now experiencing the same hesitancy as you when it actually comes down to selling the LNPA-150's. No matter what other gear I 'donate' (sell for a song), deep in my soul I just KNOW I will have huge pangs of regret and possible bouts of headbanging if I part with these monos. I am probably going to take a step back and reconsider before taking the plunge.
Just for the heck of it, what do you or anyone else think these upgraded amps in about 8/10 condition (due to age & a few light marks on the top of the chassis) might be able to go for? I paid about $3500 including the upgrades.
Thanks
Greg