To bid on an auction, please register on the self trading website, select an auction.
There is a bid button at the very top left of the product listing which will take you to the amount page.
On this screen put in the price of what you want to pay, this does not work like ebay where it will show the minimum bid.
If you have any questions about the auction feature, please contact Karl, on karl@selftrading.co.uk or 0870 162 0782.