Every other month or so, I tool around on the scenics pages. I have a pretty impressive want list. I have decided to buy all the scenics I want for one diorama each year- I factor that into my budget. For example, last year, I got all my Egyptian scenic items. This year, I think I will grab everything I need for my AWI set up. 2008- I got Gittins DDay sets.
It's funny how some of the company scenics can get crazy coin- I have all the older Egyptian pieces and they typically fetch $300 or so. The Roman barracks is off the grid- and yet the Gittens one, which imo is much better, is still available. Some of the KC, and especially Britains scenics, are collectors pieces in their own rights.