I have had a few quotes on cars, but never on just a bed. I think the shippers would carry on about the bulk of it and difficult of moving, although all the cars seem to get loaded by forklift anyway?? Cars were $2500-$3000 east coast then all the + + + for customs etc etc (in other words thieving government ripoff costs.)
Beds on the forum seem to be around $500-$1000 depending on rustiness and the tailgate.
Seeing I've dropped at least 2k into both of them (and the current one was actually pretty good!) I reckon anything less than 3k landed and you'd be in front! I know the numbers look outrageous when its itemised like that, but we just DON'T have the volume of stylesides here let alone ones that are any good! So anything you buy locally WILL need money/time/swearwords and beer. Even if you're not welding it!
The green machine I bought from Alan had a reasonably good bed, but after sandblasting there were quite a few small areas that needed addressing that just added up to fix correctly (welding.) On top of that it took a year to actually finish the welding!!!!
If you do look at it, I'd look at bringing in 2 or 3 if you could and sell them to recoup your initial cost. Theres plenty of cab chassis slicks (UGLY!) for sale in just cars!