C'mon, everyone knows the easiest way to get a Warhawk or one of those new Scorpion Omnis . . .
Fox merchant- "Look what I have here Scorpion warrior, a Star League era Marauder- you know it by the serial number!- that I am willing to trade for your mech. Now you too can be part of history and use this artifact just as the ancient and glorious Star League."
Scorpion warrior- "Is it really a Star League Marauder? Looks a bit different than our databanks say, quiaff?"
Fox merchant- "I understand what you are asking Mechwarrior, but this Star League Marauder fought with Alexander Kerensky, through all four Succession Wars, and even saw action among the Draconis Combine when the Smoke Jaguars invaded. During that time, it's abilities declined until the coming of the Clans when it's combat power was brought back towards Star League standards. Think of the history it has seen, which you will now become a part of- all I need in exchange is your Warhawk."