Very interesting - good prices and all, still have to dig in to their work. One thing to always ask is not if they have creative references...ask if they have c

Very interesting - good prices and all, still have to dig in to their work. One thing to always ask is not if they have creative references...ask if they have conversion rate references. Find out if their clients will go on the record for improvements in conversion rate or how well they work for them. With banners, as always, your goal is to make money. Gauge their work based on that if possible.