hey jordan it all depends on whether your after a quick sale or if your after "wrecker" prices.
eg.forum quick sale price on diff =$600-850 wrecker price= $1250-1800
all the rest of the stuff have been for sale recently on the forum, do a search and see what prices people have asked for them.
asking for the same price you paid for the stuff normally works well too, stick a ono next to the price and see what offers you get