Yeah, I have a pallet buster that I use on some pallets. It only works for me on maybe 1 or 2 pallets out of ten. When you have the right pallet, it's a great tool. Most of the time, however, with my pallet buster, I end up breaking more wood that saving planks.
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Just wanted to add that the pallets I have disassembling in the past two pallet runs were made up of all 2X4's. No planks as in the picture above. So, the nails and screws to fasten the 2X4's to the frame were longer. I'd break my pallet buster before it could pop off those 2X4's.
I have thought about getting something like this long pry bar...
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I don't have one of those, but for that last 6X9 foot pallet with 2X4's fastened down with both nails and screws, I think the extra 36 inches leverage would have made the job a lot easier. I only had an 18-inch crowbar with me and that was a workout on that last pallet...
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That was the only pallet I wish I had a longer pry bar to use in the disassembly of that 2X4 pallet. I have a hard time buying a new tool for a single use in ~3 years of tearing apart pallets. However, I'm sure if I had a longer pry bar in my tools box, I would find more uses for it.

Well, that, and I'm not as arm strong as I used to be. I have had to purchase a number of new tools, and power tools, as I have gotten older. I'm OK with that if I can enjoy my hobbies for a few more years. It's just a matter of making smart purchases and not wasting money.
But I would really like to hear if you use your pallet buster a lot and if you salvage good wood, or if the pallet buster breaks more wood than is acceptable. Again, my pallet buster breaks a lot of planks so I don't use it as much as I expected. It's the perfect tool for some pallets, but not for most of the pallets I find locally.