You might be surprised to know that the core charge has little to do with the core value. We have found that when we charge a lower, more realistic core charge, that we rarely received any cores. And we understand, what's the point of paying shipping for a part that's only going to get a return of a few bucks. But we are not in the business of hunting down cores for our customers so we had to create a good incentive. Since charging a high core charge, it is rare that we don't receive a core. And NO, we WON'T purchase your extra cores for the amount that you see we charge. Nice try.