Bruce,
The following is posted in the For Sale section:
"Its good practice (and saves everyone a lot of time) to list the following in your ad:
1) Location
2) Price
3) Detailed description (the more info you post the fewer questions you'll get, over and over...)
4) Photos if you have them. (this format isn't very user friendly for photos, but they really help)"
If you are looking for the best offer approach there is eBay, works every time.