I want to sell my M-Audio BX5's to my friend, but I'm not sure how much to charge. The left tweeter crackles every now and then and I'm not sure if they still fall under the warranty since they're almost two years old. Other than a small crackling every now and then they're clean and in good working order. I would also throw in a Hosa split cable. So how much do you guys think? I saw a used pair on Ebay for $149.