Stanley's are very expensive... like $500+ im pretty sure, and can be hard to find... because they are the REAL JDM. Mine had heat distribution problems, and the bulbs went out constantly. The harnesses they come with suck, and sometimes the bulbs they use are rediculous... like H3's for low beams! Other than that, they are a pain to align the beams, and I have seen many ppl that had moisture problems with it. DIY isn't that hard, and you can sometimes find DIY ones for sale that people mod themselves and sell, and they do a good job.