^^^good observations, especially in view of the fact the market is flat for the whole W126 gasser line these days.
I think also, everyone here would agree that you have the most knowledge and are probably the best fabricator of W126 exhausts of anybody around here, so I'd accept what you said as pretty much the last word about the choices...
Real AMG pieces form the 80's seem to be doing pretty well on the market these days, nonetheless....some people are willing to pay for that stuff, just like the $2,000,000 1971 Plymouth Barracuda convertible last year: a slapped together good looking piece of junk car that can only accellerate and sound good, can't corner, brake or handle for shit, but yet they sell for silly money,.... the American muscle car fad....... there is no accounting for taste, go figure.....