That might be the only thing that picture tells YOU, but it tells me that the seller had the time to take the tub out and snap the picture in order to post it on the internet in an attempt to put money in his/her pocket BEFORE he/she had time to take care of his/her animals by cleaning the tub. It says a lot to me about this persons priorities ... People can excuse it any way that they like, but if a person doesn't take the 2 seconds needed to change the paper in a tub before snapping a picture with the intent of presenting their animals to the world, I have to wonder about the conditions of the animals that we're not seeing pictures of.
There's another way to look at it ... putting pictures of your animals for sale up on the internet to me is no different than going on a job interview ... you're asking people to look at what you have to offer and give you money in exchange ... I wouldn't dream of going on a job interview without being bathed, wearing clean clothes, and having a fresh hair cut ... As someone that has hired many people in the past, I'd expect the same from the people applying for the job. It says a lot about who they are ... their attention to detail ... their respect for themselves and what they have to offer ... to me, that means almost as much as what they are offering in the first place.
I'm sorry, but I feel that when you bring a living creature into your care, it's care is not just an important thing ... it's the ONLY thing. Regardless of the picture, the tub should have been cleaned as soon as it was opened or taken out of the rack or whatever. Those animals are at the mercy of their keeper and it's the keepers responsibility to provide them with a clean and healthy environment.
I'll hop off my soap box now ... sorry for the ramble, but I have very strong feelings about caring for living things.
-adam