Whenever I put something up for sale I get deluged with messages from children that can't find their butt with both hands. I just ignore them.
Consider putting artificial limits on your sales. I only sell to people I know, or who have been around 5+ years, or who have consistently been donating or participating in the forum. Look at their profile here, it shows how much they participate and how long they've been around.
Don't be in a hurry to sell. You get to do it exactly one time and you want it to be pleasant for everyone. I've been approached by dipsticks from VRF with high 5-figure offers to buy my pieces, and I ignore them too. God knows they have more money than sense and doubtless, a horde of lawyers on retainer. That means I'd lose my watch and never see a dime for it. Forget that, I'd rather GIVE it away than tolerate that crap.
This is supposed to be fun, right? So make it fun. I once gave away a watch here to the first person who could tell me the name of my grandmother's pet. There's one public place on the Internet with that detail, and by God, someone found it. I was pleased as punch to give him that watch. Make it fun!