The buyer responded, getting a feel with what we are dealing with. Will paste the ebay messages between us:
Me: Hi, received a dispute on paypal. You purchased the book 5 months ago, what is the problem with the book? ==== no response
Me: You should respond, not right what you are doing. It will reflect badly, especially since you are selling cgc graded books on ebay as well.
Buyers response: You email on Ebay for a dispute filed through PayPal and less than 12 hours later send a second email accusing me of impropriety.. Refrain from contacting me through Ebay again or I'll report you for harassment.