I suppose I've never seen slotting as seasonal but I guess it could be a factor.
There's always plenty of track on Ebay so not sure the prices would be much different from one time of year to another?
If you need the money (or the space) sell it now, if not hang on a while.
As for the clocks going back.!! Oh no, my seasonally adjusted disorder will be kicking in soon.... In fact not sure I came out of last winters yet....
Watch out, the knights are drawing in....