H: Warface/Path of Exile/Heroes of Newerth Giftcard W: GW2 Gem Card/Paypal

I currently have a gift card that gives you 50$ in each of these three games (Warface/Path of Exile/Heroes of Newerth) for a total of 150$. I would like to trade this for either a GuildWars 2 gem card or paypal. I would be willing to take a much lower amount as I don't play any of these games and would like to buy some things in Guildwars 2.