This is what VG from the GPz900R forum had to say, I trust his opinion.
He arrived from Narre Warren a good 30 min ride ..wearing sneakers old helmet old Leather jacket broken zips jeans sunnies and No gloves ..
OK this lad doesn't ride Often or with Passion ..he's not a Biker he rides a bike now and then ...
He told me the story of the bike he has owned it twice ..
He won't budge from $8k said he has a guy who keeps ringing saying he has $7500.oo but rejects him ..
the story is he sold to a guy in Brizzy 5 yrs ago then bought it back a couple years back ..
since then has put new chain and Sprockets ...
on inspection chain and sprockets are rusted ..
needs reupholstering of seat ...
all indicators need replacing ...
a lot of ingrained salt based rusting on the interior metal brackets etc ..
oil leaks when hot ...
Actuator not working so No boost
screen edging badly degraded by weather ..
Brake master cover salt base rust pitting ..
Top of fork legs pitted ...
Blows smoke has 79k on the clock
motor has never been touched so will need a rebuild ...
a nut and bolt rest Needed ...
in 15 yrs this will be worth a lot but a lot will need to be spent first ....
From what Ive seen and by reading the tyres which he says have been on for a few years ...
bike has never leant more than the side stand so this has been flogged in a straight hard and often ..
It's a Turbo thats what you do isn't it ? ...
So I rang the seller and offered him $5K and he said he keeps on being offered $7,500 for it, so I told him to accept it as soon as he could! I know these are rare but people need to be realistic on the price compared to condition!
So its on to plan 'B' and I'll find out tomorrow at 3pm

Z1000R ELR, Z1100R ELR, GPz900R A1, GPz750 Turbo, Norton F1, Harris Mag 2, Harris Mag 5, Yamaha YZR750SP, Triumph Steve McQueen, Suzuki RGV250 Sheene Rep, Suzuki RG500 Walter Wolf, Suzuki RG250 Walter Wolf, Aprilia RS250, Yamaha YL1, RG500. H**** NS400.