30mm springs

Had a price from my local VW centre for 30mm lowering springs at £460 and £340 for a sportline tailgate spoiler fitted including vat. Does this sound reasonable?

I called my dealer for a price to fit 30mm lowering springs to my T32 Kombi 4Motion and was told that they can't do it to 4Motions, I asked if the standard springs were different and he said that the part numbers are different for a normal T32 and the 4Motion T32. Has anyone got their 4Motion...

I've got ACC on my van and have read on another thread that there is a problem with lowering with this. I don't wont a drastic lowering, nor can I afford it even if I did. If I did fit the Eibach 30mm drop springs would I need to get the ACC recalibrated?