How to sell an email list?

I'm curious...

I have an email list of xxx subscribers, that i gathers from my websites, each website with a specific niche kind of related to making money.

i've gather 2 list, one is very targeted with frensh customers, who only subscribe to buy product, or to be notified when a product is available. and the other list is from more than 16 countries.

i'de like to sell these lists, but i don't know where, nor how much should i cost per email.

thank you, for any advice

I have an idea on how to sell this list.

Open a thread on a internet marketing forum, and ask people what you should do with your list, while offering very precise description of the contents of the list. That should be a nice strategy

yes! I also recently bought an email list grabber ( of any niche) I will like to know how to monetize it.
thanks.