Classic beige keysets can be had for very cheap if you go hunting for vintage boards. WASD also supplies them (as they do everything), but then you're using WASD keys, which traditionally aren't the best.
Most people have GMK beige sets from the old Originative buy (I don't know if Originative is still shady, I've been away for a while and still maintain a boycott), or from another GB that was run a year and a half ago or so. I'd assume it gets run often since it's a popular colorway.
Also, I think Vortex sells a similar colorway.