Personally, a sheet of that stunning letterhead would have sufficed.
Transcript follows.
Recommended reading: The Playboy Book: Fifty Years.

Transcript
PLAYBOY
11 east superior · chicago 11, illinois · michigan 2-4511
November 21, 1955
Mr. J. B. Basil
3414 East Bellevue
Tuscon, Arizona
Dear Mr. Basil:
Anyone who would pay $5.00 for the first issue of PLAYBOY thinks a good deal of the magazine and deserves to have that issue. I've dug this copy out of our editorial file, especially for you. Consider it a gift. Make your payment by continuing to boost PLAYBOY with your friends and giving lots of PLAYBOY gift subscriptions this Christmas.
Cordially,
(Signed, 'Hugh M Hefner')
Hugh M. Hefner
Editor - Publisher
HMH:pjp
Enclosure