Here is a quick way to search at what sold at Christmas last year. It will take you a few seconds to do and give you much to ponder on.
Go to register reports and select the top stock report as marked with the red arrow here.
I think it is easier to work by departments. In dates that you are thinking of ordering for and select the top 100 items.
Now examine this list to see what did sell.
I find it useful to do the same analysis for the year before so 2018 as it gives an extra comparison.