Hi, I'm in the process of starting an email marketing campaign and I plan to utilize a few companies email list within my niche. One of the companies responded and said they charge $2,500 to send to their 250,000 subscribers. Now I'm not sure if they really have that many subscribers, so I want to know how to ask them to verify their email subscriptions, analytics, and opt-in rates as a professional. Also, if you had a product and/or service, what would you consider a good price to promote to someone else's email list? How many subscribers would you pay per $1000 spent? Now, I know you might ask if it's a buyers list. Yes, I know a small fraction of people who paid the company, but I'm not sure about the statistics.