Shampoo

I can't believe I'm writing about this. I went to Hair Cuttery yesterday for a haircut, and they were really trying to sell me Nioxin shampoo, which apparently helps with hair loss (hopefully with slowing hair loss). A small bottle of this stuff is $12. $12?!?! I refuse to spend that much for shampoo. I don't have enough hair to spend $12 on shampoo!

So I'm now writing to look for shampoo suggestions. I have used Pert Plus (shampoo and conditioner in one!) for many years now, but I wonder if there is a better product out there that may help reduce hair loss but does not $12 per bottle? I apologize if I'm sounding like Tony Kornheiser with his hair/lack of hair stories. Any suggestions?