The auction that I linked from my previous post Bentley BMW E39 Repair Manual found does not have those books anymore.
Bimmerzone has those in stock still.
In addition here is some other search on ebay Bentley BMW E39 service manual
I have been hunting this manual down for quite a long time. And today I have found and bought myself a copy for under $100.
I thought you’d be interested too: BMW 5 series BENTLEY E39 Service Repair Manual
Here is search I did and it looks like there are few books for good prices there