As some members mentioned ... if the post is structured good with a clear message it is potentially alright i guess. All do u might get swamped with all kinda PMs, so for that u need to be prepared.
Other not so good and maybe not so fair thing about it is some people will go that route in order to get the higher offer in ... and that shod be used in the auction section imho. So the way i see it its this has 2 sides to it.
That said i bet since u posted this u already start to receive the PMs on what ure on the fence about
Laz