I don't think of myself as someone who splurges often or buys expensive things, but there's a whole category of 'stuff' where I do believe in spending more for great quality. Certain kitchen gadgets, gardening tools, a special pair of shoes... and my favorite ever hairbrush made by Mason Pearson.
I come from a long line of long haired ladies and these hairbrushes have been a staple since my childhood. I always coveted my mother's until I got my very own on my sixteenth birthday. Sadly I lost that one, but if treated properly these brushes actually can last for decades.
They are expensive, on average about $100, but somehow they do just work better. Mine glides through my unruly tangles without pulling or snagging, and when I do find myself using another brush I'm seriously shocked by the difference.
They are a nice heavy weight and come in a variety of sizes, a few colors, and with natural boar bristles, nylon, or a combination of both. Personally I love the combination, the nylon cuts trough my bedhead while the boar bristles smooth the top and prevent (too much) frizzes. I have the 'junior' size which is plenty big enough for my long and crazy hair.
After using this brush for so long, I really don't think I could ever trade it in for another. It sounds silly to be so devoted to a hairbrush, but it's good to start each day by 'spoiling' myself with something that I really love.