You asked for it (actually only Brent and Robot did, but I've been wanting to talk about Buying for a while now). So ... here is one of the most important tools you need to help you improve your Buying:
Critical's herb and glyph costing calculator
To be honest this is Critical's MOST important secret. I release these dataz because I love you Critical Readers. This is 10x more important than posting/selling strats because the cheaper/lower you pay for herbs, the more aggressive your posting strats can be.
To keep this post clean and short I will do the How-To guide to use this calculator tomorrow, rather than mass pics here.