Selling ECommerce (Hearing Aid Customers) Data – Over 500,000 Customers And Leads.

Not sure if this belongs here or is allowed. I’m not specifically looking to make a transaction, just looking for some information.

We’re closing down our range of hearing aid companies soon after around 3 years. How would we go about selling the data to interested parties? Would we need lawyers involved? Is there a market for this? Our data is comprised of full name, email, billing address, and phone number, IP, hearing aid (style purchased), time of purchase and $ amount spent.