rust? and how bad

yea how bad is this rust?
http://i8.ebayimg.com/02/i/01/d2/bc/dd_1.JPG
rear window
http://i17.ebayimg.com/01/i/01/d2/38/20_1.JPG
http://i1.ebayimg.com/02/i/01/d4/0b/9b_1.JPG
is it worth the hassle?
how much do you think it would cost to get ti fixed , and i have no clue what the under carrage looks like

It looks like its pretty bad..

Around that rear window would definatly be cause for concern, but the other two pics look like they could be remedied with body filler.. Maybe tackweld some new medal in.. I cant tell ya how much itd cost cuz its deferent everywhere you go..

I would say by lookin at the pic that theres a fair bit of bodyfiller in the car already.. Once you start sandin down the paint, you will prolly find a lot of things that should be fixed

blah im gunna wait , hopfully more ppl start sellin there cars cause of gas prices so im prolly gunna save for a nicer one
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&rd=1&item=2479881839&category=6161&sspagename=WDVW