The last thing in the world you want to do is tarnish your reputation by not being careful in avoiding this trap. If you aren't ready for it, your potential customers may get a bad impression once they show up at your site. Though this point may be obvious to most who read this, it is amazing just how many people are trying to run a net business and haven't put the time or effort in to show a quality presence. This depends upon the relevance of your advertisement when compared to your product or service. Most publishers will provide significant discounts as you purchase more runs or impressions.
Pricing is also relative to supply and demand.
Quality publishers limit their advertising so as not to overwhelm or offend their subscribers. That in mind, if a publisher has little space left for a slot, you can expect to pay more for it. Smaller publishers will often provide excellent pricing just to help generate income to aid in growth. These were just a few advertising tips I pass on to anyone who is interested in advertising with us. Please take them to heart regardless of whether or not you choose to purchase advertising from us.