Here is what i think
investing in christmas items buy not selling them RIGHT NOW is a extremely STUPID idea!
my reasons?- The amout of farming being done here is about 50x than what as done on halloween, making only haloween items worth it to invest in.
also, level 20 farming kicked off here, making the prices for lv20 items dirt cheap, where almost noone knew about lv20 hween farming, making the prices unimagineably high! (Buyin eerie haunted doll lv20- 500k pm me kossi)

i suggest: Sell ALL your items now, and buy them all back after the event (im doing it >.<)
the prices when the event is over will be incredibly cheap and not painful to buy

sorry, but i suggest you sell ALL your items and buy them back after the update,
like i just sold my lv20 winter launcher for 120k

oh and redryder, its a good idea to keep all your hween items, theyll be worth alot. even the level 50 ones.