3sgte motor ... will require rebuild soon ..= $450
st185 gearbox .. crunches in 2nd when gearing down ..otherwise fine = $300
ct26 steel turbo ..needs rebuild ..$250
All the stuff sounds like it's flogged out and needs dollars poured into it so i wouldn't pay much for any of it.
Considering a mate of mine just bought a complete ST162 with 3sgte conversion for $800 (reasonable condition, engine and gear box run fine) I wouldn't pay too much for broken and worn out parts