I'm still pretty new to double edge shaving. I've been shaving about a month with blue bird blades. It's about time for me to buy a pack of blades. I want to buy a sampler pack but there are so many choices. I don't want to spend too much money but I don't want to miss out on the blade that works best for me. In particular I'd like to make sure I can try a feather and a derby anything else I'm not positive about. Any recommendations? Maybe a site with free shipping?