Not commenting on prices asked, just pointing out that these are available.

First edition Silmarillion signed by Guy Kay - $120

John Howe signed 50th anniversary Hobbit promo poster - $220

Alan Lee signed Lord of the Rings single volume (one of 250) - $1200

Hand written envelope from JRRT to Mrs. Doris Elizabeth Sykes (no letter) - $1790

Silmarillion signed deluxe (one of 500) signed by Ted Nasmith and Christopher Tolkien - $1800