It depends on the day.. Ive sold them in the last 6 months between $200-600. $600 was listed for a day, $200 was listed for weeks and in ok condition. The market dictates.
have seen them at just commodore spares here in sa they wanted $900 and that was a few years back now...but that was ready to paint and be put on the car...so if you can grab them as cheap as you can.
I was having a brows through eBay lastnight. Seen another one for $900 in working order with motors etc. it was from a wreckers but. They're total rip all wreckers