That depends how long it will last and how many mg in bottle. The good stuff goes for US $70-$125 . If you use it everyday and it only lasts 2-3 weeks for a bottle then it's a waste of money in my opinion. I do better looking for other anti-anxiety herbs that aren't so trendy.
How much did you guys spend? I've seen an oral spray at Holland & Barrett here in the UK for £39.99... not sure if that's too expensive or not.