I'm ALWAYS honest when I sell a horse. We rarely sell anyways but I do my best to show EVERYTHING.
We had a 7 year old APHA gelding for sale. Posted him on dreamhorse, he was on for maybe a week and he was sold. Lady drove about 2-1/2 hours to come see him, with her 5 children ranging in ages from 2 to 8. (Busy lady...)
Thunder was down at a friends house keeping a single horse company. She met us at our house, we drove down there to look at him. Loaded him in the trailer and brought him back to our house where he was brushed and tacked up. Ridden by everyone. Washed down. Put in a stall. Everything you can think of. The very next day, the lady came back and purchased him and he was gone. We had him posted for only $2500, she didn't even try to talk us down.
We really miss that horse and wish we could get him back. We'd pay 4 times as much if we needed to. We never should have parted with him, but he was the best kids horse and just wasn't getting used. We got him as a 2 year old and he was as perfect then, as he was the day he left us. He was the most honest, sweet, forgiving horse you'd ever meet.
I can't imagine ripping someone off. I'd feel too guilty and horrible I'd have to call and tell on myself.