Peter -
Seriously? That's one of the most annoying parts of having "O-Gaugeus Acquisitionitis".
Most (most!) of the rolling stock I own is still in the box. Not on purpose - but I still
pick up a piece here and there and here...now, mostly, as soon as I get it I take it out
and at least go put it on the layout (then throw the box away - there, I said it!). Then I
have to move it because there's no room...now where did I put that box?
Locos I always test, now, as soon as I get them. It's the "get them" that I don't do nearly as much, but "occasionally" still adds up. And I have one coming right now from daBay.
But it was a deal!
It's too crazy for comfort, in all honesty.