Willhelm is glade she did not pry into his past. The knowledge that he once was part of the Enclave could cause serious issues. Now two hundred bottle caps for two robots seem to good to be true. He walks over to the terminal hoping to see if he could see what she was doing on it. Once he gets closer he says "With the equipment you are carrying these must be some tough robots to have you asking for help. How about you give me a bit more information before I seal this deal?" He does not like going into situation blind, so getting as much information as possible is his best option.