You have to have the the valve covers of for the vanos seals and timing guides, so that should be built into the price.
The valley pan seal would be extra but as they stripping all the water pump and timing cases it would be good piece of mind and a small % increase in cost. I think the timing guide chain is listed as 20+ hours, then $500 in parts. Vanos seals would probably add a few more hours (I don't think the two jobs completly over lap). So your looking at a big bill for this work......
An e39 is like a beautiful wife, needs constant attention, lots of money, lets you down at the worse times but you’d never be without it.