RE: deer call
I am a true believer that buying any deer grunt call is a waste of money. With about two hours of practice you can reproduce any grunt call in the woods with your throat. Saves money and it's one less gadget to hang off your person. I don't overuse a grunt call, but have nonetheless grunted in two bucks in three years, and stopped innumerable deer for shots after they'd already spooked.
On a related note, how many different "deer vocalizations" have Drury and company invented by now? How many of these different calls have you actually heard in the woods? How much of the supposed variations in calls do you think are actually intended by the deer, and not simply different habits or tones of voice? I'd really like to know how you all answer these questions, not for sake of an argument, but to really learn something from real hunters who aren't out there to sell the latest miracle call for $19.95.
Personally, I've heard exactly one deer grunt in my life, and that was doe grunting softly to its fawn. What I've seen in videos really makes me suspect a grunt is a grunt, but different deer have different voices (like humans) so the sound varies.