Larry London (LL) buys a computer with his new store credit card at Greatest Get (GG). GG immediately sells the right to receive monthly payments from LL to a finance company, Friendly Finance (FF). Unfortunately for LL, the computer stops working three months after he purchased it. As GG won't return his calls regarding his broken PC, LL stops making payments. Long story short, all stakeholders (LL, GG, and FF) are fed up with each other's behavior; they all lawyer up.

What would help or hurt FF's lawsuit? Was there a negotiable instrument? If so, what kind? What defenses might be on that instrument?