I've watched this one quite a bit, I would say $50 is a good price up to $75 if you really want it.
If your going to keep it sealed and collect sealed games that is,
If you want to open and play it I'd say don't spend more than $50 or get an opened copy. And since you didn't but it right away as a must have, I'd say that it isn't worth spending that much just yet and you should sit and wait, LoT is pretty common.
I've been waiting for an open copy to come along that's well under $50 myself to play it.
Just 1 of many suggestions on here, but hope it helps.