An RGH is basically a way to Run Unsigned code by microsoft, such as Emulaters, custom Dashboards, Etc.. I buy most of my console for about $15, and i usually can get $80-$90 for them without any accesories. I probably wouldnt buy one for $50 unlesss i know exactly what was wrong with it and i knew i could fix it and make money on it. just my 2 cents

EDIT: also about the seals, most of the ones i buy have the seals on them, but i break them to fix it, it only takes me about an hour to fix and xbox, but it takes like a month when you send it to microsoft...