You would get and save the most money by returning it to stock, selling the parts you wouldnt reuse on the jk, and keeping the parts you would.
Modded TJ's will almost always go for the same, or less then stockers. Especially if done on a trade in.
You can find stock set ups all over the boards.
I have a set of stock bumpers, track bars, and LCA's to get you started.