Hi iam interested in your MicroSD Card for sale
Good.  What is your offer?
I would like to offer  you 65.00, I know their worth and that seems of correct value to me.
Well I think there are a lot of opinions about the value, and I think it's good to open a dialog about the value.
This is true, There are larger ones for same price, so I feel my price is fair. I would also pick up the item at your convience. 
That's interesting.  I've seen ones my size sell for $85 in some places!  Picking up the item is a good offer too!
Really? I have seen them cheaper then that. How about I pick up the item anytime you are free, and I pay 69 for it?
That's a pretty good offer.  Is it possible for you to come up to $71?
Since I am picking it up I would like to stay at the 69.
Hmm...Okay, let me think about if for a minute.  You will definitely like this SD card.
I am sure I will, it seems great, I also think you will like not having to leave your home or go out of your way. I would love to buy it, I could even meet you in the middle at 70.00. 
That sounds even better.  I accept your offer and look forward to seeing you.  I'm glad we could come to an agreement!