Sell advertising space in magazine

We are a membership organisation and are planning to publish two magazines.
The first will be published by mid-September 2008 and will be circulated to 10,000 people in Manchester.
Advertising space must be sold by 29/08/2008.

The second magazine will be published by October 2008 and is more exclusive. It will be circulated to 1,000 professional people in Manchester. Advertising space must be sold by 03/09/2008.

For both magazines spaces available are Full Page, Half Page, Inside Front Cover, Inside Rear Cover, Outside Rear Cover.