I have a friend who bought a runner and he has two piaa lights he wants to sell for $100. I think they are 510s! even if they are not 510s piaa is expensive from what i can tell. Is it possible to buy any piaa 2 for 100. I just want to know what u guys think. they also have locking nuts on them so they must be pretty expensive. I also cant find the price on the internet what do the 510 usually run at