what i do is put a ad on craigslist also look in the car and truck section and auto parts i found few vehicles that way.
far as junking a vehicle i take out the battery,cut off the cat,take off any good sheet metal parts such as hoods,trunk,fenders,doors. if it has aluminum wheels take those off to. i also take off any aluminum engine parts those you can toss in a aluminum pile. also take off the copper wiring thats easy to get to. take off any electric motors such as starter,alt. i also take off the computer,airbags things like that. those you can toss on ebay and make few extra dollars with. take few pictures and you can put your sheet metal parts on craigslist in the auto parts section i sold a few that way. if they don't sell say in a month you can toss them in your metal pile or you could try ebay. all that stuff ads up in the end and make you few extra dollars on top of what you would get at the scale from the scrap yard. hope this helps ya out.