I have a question about an ad?

Practically Brand New Xbox 360 250Gb< Xbox360 slim
Somebody sent that too me as I have an ad too sell my Xbox 360 slim 250 gb but I don't understand what it means?? Please Help?

They seem to be saying that an almost new Xbox 360 250GB is worse than a Xbox 360 Slim. Im guessing they have a problem with the 250GB's or the fact that it is slightly used.