Banner advertising works only in volume. Some people use this method exclusively, but you need to understand it's all about volume.
For an inexpensive banner design you can try:
Then search online for sites or programs offering banner ads in a CPM or CPC option. CPM means cost per 1000 impressions, and CPC means cost per click. Most banner ad agencies will work on a CPM basis.
Banner Advertising:
Many people are afraid of banner advertising, but they shouldn't be. What you should be looking for is a guaranteed return in terms of paying for a certain number of click-throughs. (CPC Banner Advertising)
I found a site that had an interesting CPC banner program here.
Traffic Excess does CPC banner advertising. In addition, it allows you either design a free banner or have one professionally made for a very reasonable fee.
Bclick does results-based banner advertising.
