I found this on another site and has some great info for all of us - selling and buying on Craigslist. THESE ARE NOT MY NOTES, I'm just passing them on.
1. Be direct and to the point in your ad. You will attract more like minded people.
2. Search listings for similar items that are priced competitively. If your item doesn't receive any responses in the first 72 hours, either there is something wrong with your ad, or the price is too high.
3. Designate a public place in your ad to do the transaction. I like the mall where there are others around, security, and cameras. People don't feel comfortable meeting in your basement unless you are selling a 500 gallon fish tank or a couch set. When selling a high dollar item, I like meeting at a bank.
4. I always start every ad by stating, "if you see this ad, the item is available". I've noticed this eliminates all those who email me asking if the item is available.
5. Due to all the spam these days, either put your phone number or request that interested buyers leave a contact number in their email. I don't respond to emails where the person didn't follow the simple steps needed to get in touch with me. Serious buyers talk on the phone. Tire kickers text and email. I've noticed that many people who email or text me saying they are going to show up at a specific place don't, while the majority of those who I speak to on the phone do come.
7. There is nothing worse than wasting your whole day for no shows. I always ask that the buyer contacts me by phone when they leave their house. I coordinate to leave mine at the same time. If I don't get voice confirmation, I don't leave my house. 99% of the time, they will show up.
8. You will get lots of offers. Most of the time they will be from low ballers who are trying to turn a profit. Know the value of what you have. If you are offered $100 for an iPhone and you could sell it for $300 on eBay, politely refuse. Now days, a completed item search on eBay will yield the average price on almost any item for in the last 30 days.
9. I often put "price is firm" in my ad. I calculate what the item sells for on ebay and subtract 15% for eBay and PayPal fees. This is the fixed price. Not a penney less because I know what i can get later. This reduces 90% of the low ball offers I used to receive. Now, when I list something for $120, I'll get an offer for $100, not $60 like the old days.
10. Use common sense. This one is a no brainer. Use courtesy in your emails. I can tell from the first email I exchange with a potential buyer on how serious they are, their educational background, and their manners. This will go a long way.
I used to get an average of 10 emails per item I advertised. 8 would ask questions that would be eliminated if I had implemented the above 10 rules, 2 made plans to come, one wouldn't show up, and one would. I now get 2-3 emails and when one buyer says they are coming and I get voice confirmation, 9 times out of 10, they will show up.
If buyers and sellers followed the above rules, everyone would save much valued time, resources, and energy.
likely I'd cancel the ad, wait a spell and relist with the correct price, if someone called on the original, first I'd explain, but probably honor the original price.