Customer called us out for a clogged entry way toilet. I tested the toilet on arrival and it was clogged inside of the toilet. I asked how she felt about the toilet and she did not like it. I recommended replacing it and she agreed after we measured for the fit of the toilet in the bathroom. When I pulled the toilet the flange was sunken about an inch below floor level. I let the customer know that the flange would need to be raised by a service plumber and was asked to stop work while the customer talked to their spouse. They decided they would pick a different toilet and have the flange fixed and the toilet installed at a later date. I cleaned up throughly.