Darling, i've too bought the Thoth and it DID ruin my finances back them. But it was SO rare to find decks here, i didn't, and still don't, regret anything.
I've used the Thoth for some time, when i practiced the 'reading-with-book' method...it because easier then, i was much more a beginner than i am now.
But right now, when i'm really trying to get in touch with the decks, to understand their symbolism...no, Thoth isn't for me. The borders don't bother me, the keywords a bit, the problem is...it is not clear to me. Mainly because i haven't really studied it's symbolism, it's complex...besides, right now i happen to be in love for another deck.
But i must say, Thoth was my love deck for many months...
Now, do you buy or not?
If you won't get absolutely poor because of this, GO FOR IT! Definitely, you might connect to this deck better than us in the end. Or you might keep it for collection. Or for studying different symbolisms.
There's a Thoth forum here, it might be interesting to visit...those study groups are really enlightening! I'm not there just because i'm lazy
AND, the Thoth is the deck my "skeptical/atheist/i-really-don't-believe-in-these-card-stuff" boyfriend likes most, from my collection. You see...most of people are really curious about it. Satisfy your curiosity, if you can!
~~~Yuko