The deals do exists - but at in person train shows and not online. But I overall agree with you and I see the increase in costs as coming along with the end of shake the box kits and the beginning of premade everything. A case of a market that mortgaged it's future for the a quick buck today.

That said, I think, model railroading will survive and return to it's roots of small basement and garage makers thanks to 3d printing.