I seriously don't remember what I paid. I just got the whole thing installed, along with a new cat. When I say how it was routed, I commented that I would have killed that lower bar the first time out. So he just cut it, welded a becn forward (which was odd) and routed it much higher up the along the oil pan.
Then, as I drove it a few days I started having major engine issues. It kept bumping and jarring... I looked under the hood and the O2 wire was touching against the manifold. It kept shorting out. So I had it brought back, rewired and ziptied away from the manifold. The issue of relocating it took more thought than we gave it.
Money shouldn't be too big of an issue. If you want it done right, shop around abit, but get it done. It'll save you soo much more in the future. If either one of those things get messed up on the trail, or the streets... It'll cost you even more to get them repaired.