Online auction site Trade Me had a bumper month in January with more than four million unique browsers, the company revealed today.

Trade Me released figures for last month that showed it had more than 1.3 billion page impressions with the average session lasting 17 minutes and 59 seconds.

Unique browsers were up 40% year-on-year to January 2010. Total page impressions were also up 40% year-on-year and the average session duration was also up 7% year-on-year.