I once bought a STTNG for $1200. I was so freaking happy. Didn't even have a credit dot. I was the first person to email the lady on Craigslist. Literally minutes after it was posted. She had it listed at $1000, and my original offer was $1200. She took that immediately. She had multiple offers for more, but I was there too quickly. Should I have offered more because she could've made more? Hell no. The verbal deal was done.
I did have a verbal deal done for a POTC for $500 back in 2011, but when I got there he had sold it for twice the amount that we had made the deal for. I had driven a little over two hours, so it wasn't fun. I guess it just comes down to you win some you lose some. Sellers should always research the item they are selling!!! If they don't it's their loss, just like the guy emailed back.