Probably not, Shabak (sp?) I think is scaling down there 1:600 also, with eBay the prices are somewhat cheaper than buying from a model store for 1:500 models and 1:400, If you look at the trends from catalog to catalog from the Airplane Shop, you'll see that they are moving to the bigger models (e.g. herpa 1:600 to 1:500 and the 1:500 to 1:400 and Shabak 1:600 to 1:500)
Hope that was of some use. those aern't facts, just the way I am seeing the trends.
Lighten up while you still can, don't even try to understand, just find a place to make your stand and take it easy