You do not need to sound like William Shakespeare, you just need to sound like a regular person who sat down at the computer and did the best job he could to describe the equipment honestly. Be down to earth in your posting.
If the unit has to be removed on a Saturday, if you need a crane to remove the system, or if the workstation is not included, you need to mention it.
Again, put yourself in the shoes of the Buyer — they are always going to be nervous if you spring something on them at the last minute.
You can waste a lot of time on the phone going back and forth and talking about the weather or the local sports team, not to mention religion and politics. Next thing you know, you have just spent 15 minutes.
When people write to you, they are more efficient and you can be more efficient in your answer. When the time is right, you can get on the phone and visit with them.
Obviously, if you think the right deal comes along, you may want to take it, but sometimes it takes time for people to learn that your system is for sale.
Do not be in a hurry to sell – when you are hasty, you make mistakes.