I will happily help any native German speaker with their English in exchange for the same, with German (derp derp). I am available on Skype and to meet in person if you happen to live in my area (VERY unlikely). I have a masterful grasp on everything you could want to know and I could also teach slang/colloquialisms if you're interested. I've got it all covered.
This offer stands indefinitely, so even if it's MONTHS from now, please let me know if you are interested.
xx.