Bought something 2 weeks ago from a private seller (not a business). In the last week I've had 3 increasingly pushy messages reminding me to leave feedback! They are not a new seller trying to build theirs up or needing it to get the funds released, they have in excess of 500 seller feedback already.
I buy a lot on Ebay and tend to leave feedback in batches once or twice a month so I can just C&P the same comments in for everyone. I'd just done it when I recieved the item so as yet haven't left feedback for the 15 or so items I've since bought. Was going to do it tonight anyway, but WIBU to leave her comments saying "Great item, fast delivery, but don't appreciate being hassled for feedback" ??