I spent over $60 total on a Curly Hair solutions package. It included shampoo, conditioner, gel, curl lotion, and curl keeper...was it worth it? Absolutely...I order from them every couple of months.
My flat iron was about $170 (you can get it much cheaper now). The next most expensive was the Affirm Mild relaxer and all that comes with it, about $70(?).
$100 on a ceramic flat iron... it was worth it then but I don't use heat on my hair now
Aveda Products... $21 for 8 oz of Deep Penetrating Hair Revitalizer...$18 for 2.5oz anti humectant hair pomade... and the list goes on but they are sooo worth it to me