Hey Matt,
you've been here long enough to know the general feeling about buying from a store that does not care for their animals (by purchasing you are condoning their negligence). My question is why didn't the worker take some sort of action? I wonder what condition her own chams are in if she can allow this to happen. I know workers have just so much control, but that is what herp societies and animal welfare orgs are for - she could have contacted them anonymously so as not to jeopardize her job.
That said - do you really want the care of a gravid female that may be eggbound or have other problems due to her poor care? You will likely be taking on some pretty hefty vet bills and 2 animals that may well die. Parasites? MBD? Dehydration? over/under supplementation? Believe me, I REALLY understand your wanting to take these two home. I have been known to rescue anoles and geckos, bring them to good health and ship them to my mom in FL so she can release them. But you really need to think this through. If she is willing to give them both to you for free and/or split any vet bills with you then MAYBE you should consider it. Well this is just my opinion and I am sure you will get others. It is hard to just walk away bit sometimes it is necessary. 
I don't go to pet stores I have never been (and some that I have been to!) for this very reason...
lele
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Chameleon Help & Resource Info
0.1 Veiled Chameleon - Luna. She's now hanging from her big jungle gym in the sky
1.0 Beardie - Darwin
0.2 felines - Kyndra and Lita
0.1 African Clawed Frog - Skipper
0.1 Mad. Hissers and she is on the loose!
0.1 Chilean Rose Hair Tarantula - Rosa Leigh
0.1 Goliath Bird-Eater Tarantula - Natasha
?.? Pinktoe Tarantula - no name yet