Your picture makes it look more red, than just along the top. It may be a male in that case. The females seem to turn more red all over.
As far as pricing, I've seen people post where they paid more than $10.00 for a single shrimp. I just got an order of 25 shrimp, a BN Pleco and 7 different plants for $35.00 including the shipping charge. I didn't ask for a breakdown of the prices since it was advertised as a package deal in a forum. I just jumped on the offer since I knew it was a good deal.