[Blackthorne]

In my opinion, no. I believe the feeback rating should only reflect satisfaction/disatisfaction with a fully completed sale.

Having said that, I think there are other ways that you could reward the seller, like dropping his name when someone is looking for stuff he/she retails, or just by simple post in the Off Topic area declaring that you were happily surprised by the customer service, even tho you did not buy.

My 2 Cents CDN