how can I find out if a phone has a bad ESN

[kkmjz]

I was going to buy a phone on Ebay but I want to make sure I can use it and that it doesn't have a bad ESN number. Is their anyway I can check and make sure before I buy a used phone?

[Jude]

Hi kkmjz. My name is Straight Talk Jude and I'll be addressing your concern. For me to assist you further, we need to take this issue offline so I can address it further. I will contact you directly with a private message. Thanks.