WARNING:
if you fail her quest by helping the other doctor in downtown Jericho, she will stop selling items ( which is important because she sells boss armor )

There is an amusing infinite tech scrap exploit with this vendor. If you sell her your grenades and molotovs, then go to the medbay, the items you just sold will regenerate in your inventory, and you can sell them to her again. Rinse and repeat going to the medbay between sales, and you've got as much tech scrap as you want.