I don't blame you - that was a pretty annoying change. I've been saving all the articles in separate issue subfolders within my Dragon and Dungeon folders (along with the art & maps), but Boccob help me if I'll be able to find the errata on those issues.Figures. I haven't been keeping up with my Dragon/Dungeon reading, since they stopped compiling the articles into a single download.
As any estate agent will tell you, there are three main factors in a house's price: Location, Location, and Location. It would be possible to say how much a generic house costs in a certain ward in Sigil or Sharn. But as for the cost of a generic manor house, think of the difference in cost between the more rural areas of America and the centre of London or NY.