I'd be more worried as a seller than a buyer. It's eBay, and it's advertised as having extensive restoration work done. Whether it's totally unrestored, or fully restored, you aren't going to really gain anything from a computer video. The guy's not going to sell something for $26k without fully expecting it to be working as intended. These types of things need to be auditioned in person to fully appreciate. Then again, the "extra" value of this listing is that it is supposedly a #1 prototype so it's a collectors piece and for continuous use, a 2500 or production 2600 would be better. After all, you don't go driving around town with in a factory original L88 corvette or Boss 429 mustang, or original aluminum bodied AC Cobra. There's too much at risk just putting them on pavement. So you can expect that this unit would sound exactly like another production 2600, or even any 2500's since aside from having a few more output transistors, it's probably essentially the same.