I've had great experience from Pass Labs pertaining to an INT-150 I purchased used. They fully honored the warranty and when my INT-150 sustained shipping damage on its way home Pass was absolutely superb.
Hostility from manufacturers
I know its a cottage industry, and margins are thin, but I still think its shortsighted of them, and harms the industry in the long run. I'm talking about several interactions I've had with manufacturers after having purchased their products on the secondhand market. They should think about what would happen to their prices and their sales if their products were not resellable. Maybe they would like us to send our components to the scrap heap every few years or so just before we purchase their latest upgrade.
Fire away..
Fire away..