Hi, I've got a nice phone here with an extra battery cover. Thank you for you interest in the item. I'm looking to get 10$ for it.
Woah no way, these are $5 on amazon. The best I can do is $6.
But on Amazon, you have to deal with waiting, and possibly paying for shipping. I'll work with you though since I am trying to sell quickly. 7.50?
Ok, but only if you ship it first and I'll mail you a check. 
Works for me, thanks.
Before I accept, is there a warrenty?
Its a used item but it has the standard manufacturer warranties if they apply.
Ok, deal.