there is an article on E code gearboxes on our web site.
most owners seem to have given up buying used early turbo boxes, as the syncros are so troublesome. The days of "cheap low km imports" are long gone... these are now mostly old and tired cars. remember, the syncros could be shot in as little as 50,000km in the early box
If you cant afford to rebuild one properly. then buy the latest lowest km box you can and jsut hope its OK. The later double syncro boxes cost about double in parts prices to rebuild due to syncro costs