I'd probably give negative if there was a mutual agreement. On the other hand, did you tell the seller that you were away and it would take time for you to pay? I've been away a couple of times and told a seller to hold an item for me and I'd pay as soon as I get home. It's all about how communication went, really.
I'll openly comment on the matter since it was me. Today was the first time I posted items for sale on this thread and take full responsibility for any miscommunication. I've sold hundreds of items on eBay and google+ circles and just found out about this thread as another great option to sell.
The initial inquiry started 9am this morning, said he was interested. I said great and provided my PP info(that process took over an hour). No payment or communication for over an hour after providing PP info. So I sent a follow up asked if he was still interested in buying as I had 3 other people inquiring about the same items. I waited nearly 2 hours with still no follow up communication and decided to sell to the next person in line. Entire process was over 4 hours.
I admit it was my fault not commenting I had sold them to someone else after waiting. I figured he would get back to me instead of instantly sending payment when I had asked if he was still interested because no payment was sent. At least I would have expected a msg saying hey i'll be out for 2 hours running errands, please hold onto these for me.
In addition, I refunded his money as soon as I realized he had paid and apologized a few times about the whole incident and the miscommunication.