What is the cost of this list?

What is an appropriate price for an e-mail list of 27K buyers, mostly 35+ females from the US, with the emails divided into 7 segments based on what they have purchased? The current owner has been sending occasional promos and earning $50-$200 worth of sales per campaign, but has not tested other products like beauty, home and garden, etc. There are no statistics such as open rates or CTRs since the list has not been imported into an email marketing platform like Mailchimp or Aweber.