dissapointed

Hi folks. Just bought a B180cdi for the Mrs to replace her VW Touran. It's a 2005 model with only 25k, leather, fmsh and panoramic sunroof. Hopefully collectinig on Monday. Meantime, I'm after an E class and have been reading up as much as possible on these. I'm after a post 2006 facelift...

Missed a £2k "W" E430 Estate at the weekend. 2 owner vehicle that had been meticilously maintained. Am I mad wanting one? I know of one other locally that I might 'cold call'. Rust is the big killer obviously but are they ok otherwise??