"which have had no previous bids."
???
Are you sure they were no other bids, not just that the price shown was the starting price.
For example, let us say an item has a starting price of $10 and I bid $20 on it.
The listing on eBay will still show a starting price of $10 only
If you bid $14.75, then my bid will show $15.00
For more information on how bidding on eBay works, please take a look at: http://pages.ebay.com/help/buy/bidding-overview.html