check the underneath where the sub frame meets the floor pan. the bottom of the rear quater panels is another spot. Its not hard to take out the inserts either side of the wheel arch and have a look/feel right down the bottom. (just don't bother with the one near the fuel filler, you won't get far!) behind the compliance plate, as already mentioned in the engine bay is a typical spot, and behind the fender at the bottom, just in front of the door. check the frame under the fender while your there.

price also varies according to where you are. $5000 in WA will get you a really good one in stock condition. I picked mine up for $2000, requiring work, with rust.