Well, I will keep my identity hidden for this 
post, but I too have not bid on auctions that I 
wanted to bid on just because of the seller's 
tactics.  Recent events come to mind.  I recently 
won a cel from a very frequent seller and poster 
here.  I paid for the cel with paypal a couple of 
days after it ended.  They took my money, and 
forgot to send my cel.  One month and a week 
later, it arrived. I told this person I was quite 
unhappy with the deal, and was going to leave 
negative feedback.  She in turn wrote me a nasty 
letter, and has now banned me from bidding on her 
other auctions.  VERY unprofessional, considering 
it took over a month to get the thing.  This 
seller also tacks on extra charges to get high 
prices.  Now I dont give a damn if she bans me, 
I'll never buy from her again. There are are a 
couple of other people I dont like to deal with 
either who tack on little charges....for some 
really unreal things...  Oh well, that's just 
more of my money to go to trustworthy dealers and 
sellers. :)