I hear ya, but LEDs now days are pennies on the dollar to manufacture. Example, I built an LED cube with 110 LEDs, the logic board, transformer, etc for about $70 worth of parts. At the volume these are made, it's at least half that. In many cases manufacturing LEDs is actually cheaper than halogen, depending on durability and quality, but last I checked the lights on these aren't Cree cells or anything of that caliber.
It's consistent because they are probably all made by the same two or three manufacturers and everyone marks them up from there.