I dunno Dave - remember, 'condition is everything'. Maybe we should compare this to Spiller's Parker as far as what it is and the condition it may be in. We were surprised to see that one go for $10,500...
Both men were highly esteemed sportsmen and authors of a great many books (Derrydales as well as others) and articles in sporting publications. Both men were considered to be the "last word" in their chosen sporting field - Buckingham on Southern waterfowl, quail etc - Spiller on the ruffed grouse, woodcock, snipe etc.
(Take what I've said here with 'a grain of salt' as it is only written 'tongue in cheek'.)
Should be a very interesting auction