You should come up to Canada, they are cheap and fairly common on kijiji.
Depends on what part of the country. Southern Ontario and BC salt their roads to $#!t. Prairie provinces use very little salt. Of course nearly all the engines/cars are high mileage, but compared to cars built in the last 5 years, they are very rebuildable.
How far are you willing to travel? I see them turning up in the LA/inland empire area from time to time, for around $2500, mk1 turbo diesel Jettas and n/a diesels but mk2 turbo diesels are pretty rare. Mk3 IDI diesels were, NEVER sold in the United States, as far as I know, so, odds are you won't find one, although I have actually seen one for sale around here, probably came from Canada. It took me 6 months to find an mk2 I liked and there are times I wish I would have bought something else.
I occasionally see 1984 jetta td's for sale but you HAVE to understand the td cars where rare when new in the US only built in reasonable numbers for one year and most have been junked in the last 30 years.Why not buy a n/a you like with a bad motor and swap a td lump in?
What about this?http://sfbay.craigslist.org/eby/cto/2760141127.html
wow those are costly down there...bought mine for $800....high kms tho....but picked up a refreshed engine...swaped out engines in less than 5hrs in the drive way.... now i have 3 spare engines lol....love having extra parts...give it time...a good deal will come along...always dose for those who keep looking.