There's definitely a tool. TSM lists crafting costs in the ui.
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Not really though. For some, the swift Zulian tiger is a huge item. For me, I don't feel like I need it. I have Invincible, the Rag 25h Firebird, the Spider, spectral tiger, M Gul'dan mount, etc. I always valued the spectral tiger over the zulian tigee, I've even passed on the Zulian tiger to my friend because of lack of interest. So while there's something to buy, the desire also has to be there