He was asking $6800 and I offered $6600. One of my personal rules of thumb is to never pay asking price...stupid of me? I don't know, but I stick and have stuck by that rule for years now
Not stupid, I'm kinda the same way... but also, when I sell something, I set the price at the minimum I'm willing to take. I make that clear to any potential buyers, and it's rare for me to have to show something more than once.
You guys are only $200 apart. You must not really want it, and he must not really want to sell it.
If you do really want it, show him the cash... it's worked for me... more than once. I've even emailed pics of the $$$.