David and I know this guy. His watch is OK but the used watches selling there are not as good as Lam in my opinion. If the price is good, can consider because he sell genuine watches...
I will suggest your friend to bargain harder, he might reduce from 11.8 to 11K..or even lower...
I think most of the collector will not like the AMG version, personally, i don't like...it's like advertise for them...i rather take the normal/standard version
.. it's not surprise why it can't sell unless the price is real cheap..