It seems a bit unfair that if a seller runs an eBid 'Dutch' auction and you have bought from them before that the next time you order from them again you can't leave them a feedback.
I'm just thinking about this as I've ordered my third lot of packaging material from a seller and yet in their feedback it looks like I have only bought from them once and that was ages ago. It makes it look like the seller isn't very busy on eBid when really they might be doing a really good trade here ! I don't think this is very good for the site and it doesn't seem very fair on the seller that they don't get the buddy points for repeated sales.
Another reason for being able to leave feedback a second time is that the service might have changed since the last time you bought and you might want to leave a different type of feedback.
What do others think about this ?