RE: shot gun for small lady
I'm not sure the NEF Pardner would work for clays since it's a single shot.
I did some looking. I believe a youth model gun would fit you about right. Most MFG's offer a youth model. Although most that I found were expensive (around $600), I did find an autoloader youth model sold by traditions that isn't too far over your price limit.
It's the ALS 2100 Youth. The retail price is $479, which is over your price range, but you may be able to find a shop that can get one for a little cheaper.
You may also be able to ask a shop if they have any used youth model guns. This might be exactly what you need.
Good luck,
Slice