Just because you don't want to spend the earth on a sign, doesn't mean that it has to look cheap. Folded tray signs are an excellent alternative to the all too common flat panel with unsightly fixings.
Made from Aluminium or Aluminium composite & mounted onto internal frames, they have a folded return edge which gives the sign some depth and enables it to stand off from the wall, usually by a couple of inches.
There are no unsightly fixings through the face of the sign and they are much more resistant to the warping and bending that flat panels can suffer from over time.