Well mine has been doing this since the day I bought it (7 years).
Even Ford said it's not worth the repair until it finally doesn't start anymore, since it could be either the fly wheel or the starter.
Mine will grind about every 4th start and when it does happen it will finally start on the 2 or 3 try.
As for selling it, that's upto you, but remember it could happen when the person you try to sell it to starts it.
It could be up for sale for a long time if the problem is on every turn of the key.
Trade in value would be low too.
Do I hear AS IS!
