I have paid a lot for both males and females of good quality, but when I'm pricing kits I take into consideration several things, including quality and purpose.
I DO price my females more usually, this is because I tend to have more people looking for females, if I have a lower priced female, that's exactly what you're getting a low priced ( read as lower quality) female. If I have a really nice female I'm either going to keep her myself, or if I have a lot of those lines, no room for her, etc. then I'll charge more for her than most males, simply due to the fact that I keep most of my females for my own program or have people waiting to get females from me which means I offer less females for sale, which comes down to the simple fact of supply and demand.