Hi I have just been looking at a ST165 GT4 for sale 1988 model 82,000 kms guy wants $8,500 however I noticed that the rear diff is leaking oil can someone give me an idea of the cost of having it reconditionined/replacing the seals in these, also it appears water has been getting in through the rear window seal as there was a small pool of water in the spare tyre well. Has anyone with an ST165 had this window seal replaced can anyone give me an idea how much $$ i'd be looking at?