Since ARC does a lot of model upgrades, let me tell you what they did that I found unbelievably unethical . It was in the 1990's; maybe they have abandoned the practice.
When ARC discontinued the LS-2B MK.2 pre-amp (originally listing at $2995), their dealers were allowed to buy from the factory and then sell to their customers ARC's remaining stock of "Factory Reconditioned" units in sealed boxes for $1995. Great I thought, and bought one. After all those units had been sold, ARC sent their dealers the remaining stock of new (as opposed to "Factory Reconditioned") LS-2B Mk.2's. I found that to be lacking in integrity; how 'bout you?
I felt betrayed and taken advantage of. What ARC could and should have done is offer both new and Factory Reconditioned LS-2B MK.2's at the same time, the Factory Reconditioned units at a lower price than the new. THAT would have been the honorable, ethical way to sell off their remaining stock of the discontinued model. I lost a lot of respect for ARC by them acting this way; how 'bout you?