How Would I Write A Letter Saying I'm Selling My Car To A Specific Person To Attach With The Title?

It appears as though all that you need to do is to write a basic cover letter in which you confirm that you agree to sell a vehicle to a specific individual. This letter will normally serve as a legally-binding document. Start off by clearly articulating your willingness to sell and include the buyer's full name and home address (if available) in the letter. Also be sure to indicate the car's make, year and if you are selling it "as is." You should also mention when you are willing or able to complete the transaction and be sure to include your own contact information in the letter.

I would keep it simple, saying I ________ am selling a 19__ whatever make it is , with ______miles on it, VIN________ to __________ on todays date.  I am selling the car for _________the car is being sold as is.  

Sincerely,
your name.

I would keep copies of the sale letter and a photo copy of the title just in case something happens later on.

Good Luck.

I would also have the letter notarized, because the buyer and seller both will have to produce identification and two witnesses to the transaction.
If any problems arise later on, a notarized bill of sale is much better.
Make sure that you keep a copy for your records also.

I would like to send a letter to my insurance company to value my car