No affect so far. I got back in the hobby a few years ago and pre-ordered all the engines and rolling stock I have so far. In the beginning, I ruled out steam as too expensive, so everything is diesel. I like the command control engines and have little interest in anything older. Also I now have just about all I need and/or want, so new orders for engines and rolling stock are tapering off rapidly. The budget is now going to layout accessories and expansion.
As someone else stated in another recent post, in considering a used electronic engine I would figure on replacing the electronics. That would figure in to the price I would be willing to pay. I have one Railking scale engine that I am thinking about trading in at my LHS for a Premier version. That is the only thing I have even thought about selling or trading in. Everything else will be staying.
I am hoping my grandson will want my trains when I am gone. If not and the trains are worthless by then, would I really be out any more than I would have spent playing 18 holes of golf every week? I expect I would be out considerably more with the weekly rounds of golf than I will be with the trains. Of course surviving family would have a lot less to dispose of had I chosen golf instead. 
