We teach a lot of ladies shooting. And carrying a gun is part of what we teach. Due to ladies styles of clothing, as well as how they wear their clothes,,, it can be a challenge.
Frustrated middle child,,, (Amanda,) has done fashion shows highlighting ladies & carrying guns. We recently got a copy of the most recent show, and it's a good thing to see.
Purse carry has it's faults,, as it's "off person" and not all purses can be carried cross chest, or are properly built. Some do have the steel re-enforced straps to assist in retention during an attack. But the best advice I can offer is to shop around and find the type, style & such that offers the features necessary for the lady. Now, there are many out there. Coronado Leather, Galco,, both top notch & high quality. (We prefer Coronado.) And there are others mentioned above. Miss Penny just recently got a small one from Gun Totin' Mama's. She likes it for her CCW of her Ruger LCR.
But when discussing the cost,, remember,, we spend a fair amount on a quality holster,,, and a purse requires more work to build. Quality carry is necessary & not always inexpensive. Your life may depend upon it,, so choose wisely.
Plus,, ladies do like to have different purses for different days & events. More than one will be often required.