I find it a bit weird that people dont at least use a damp cloth and give gear that is that filthy a once or twice over. I understand not everyone has an interest in old gear, but surely most people would understand that filthy gear isnt likely to attract as much interest as something that looks even moderately ok. I wouldnt want to even touch other peoples stuff like that for basic hygene reasons.
Slightly off topic, but I wonder if thats a coco2 or 3. They look much the same, but are pretty drastically different under the hood.