36 tinsel is ~ 300-400 bells usually depending on what you buy (if you're asking, if not, then this is against the rules and this post can be deleted )
it buys you 7 cherries and 1 winter mitten, and cherries are 50 (currently, more if you wait probably) each so that's a little over 350 bells.
it can also buy you a christmas candy, which is about 300, but you may find more or less for it depending on the eagerness of the buyer.
it can also buy a jingle and 3 cherries and a winter mittens, but jingle idk anything about
it can also buy lumps of coal! which I also don't know much about (except that 2015 ones are rare)