How much would a Game Boy Color and its games be worth now ?

I have a game boy color from '97 with a collection of more than 20 games all in working condition, how much cash could i get for these if sold to avid fans. Also how much could they be worth in the future and the same for gameboy advance.

What is a VPN?

VPN is (Virtual Private Network) were first used by companies to enable their employees to securely access internal systems such as email remotely (e.g. from home or while on business trips). Today they are increasingly being used for personal use by individuals to protect their privacy while online in public places (e.g. when using the wi-fi connection in a cafe) or in a country where the internet is censored / blocked (e.g. China, Saudi Arabia…).