Whenever a zero rated or newly registered bidder was on one of my listings I would remove the bid and block them from bidding again , If they are genuinely interested they should contact you to ask why you did that ,But I have come to realise that classified adverts are a much better way of selling something than an auction on ebay and I now have also realised that facebook is better and much safer than ebay if you are a seller as the biased ebay rules and regulations means with selling on ebay the odds are stacked against you if your buyer turns out to be dishonest or just an arse and you put your self at risk of losing your items and money as well as your reputation and your time