The first thing that comes to mind is: chicken feed. I *could* buy cheapo feed or cheapo eggs at the grocery. But I value having organic free range eggs from my backyard. They cost money to feed (I refurbed an old garden shed for their coop), but I get way better quality eggs. (If I compare to comparable quality eggs, I'm saving money - free range eggs at the farmers market run $8 a dozen!) Plus, the hens are funny and provide hours of entertainment.
One from last year - I asked for and got a new range for my birthday. We had a "high-quality" range that still "worked" but whenever I shoved a pot over to make room for another, the grates(?whatever you call the metal things above the burners that you set the pots on) would separate and I nearly dropped boiling water on myself more than once. So I got a good range. Not a Viking or anything, but a good-quality GE (I did wait and buy it on sale). I love it. It makes my life so much better. In addition to not coming apart on me when I move a pot, it has a better layout for the knobs so I don't have to guess or think about which burner I'm turning on (or turning the wrong one up by accident and burning something), and indicator lights on the burners so if I leave one on after cooking, I can see it as soon as I turn the kitchen lights off. Note - I do a LOT of cooking and canning and food prep. Also, I donated the old range and got a tax receipt. Totally worthwhile expense for us as it allows me to cook great food at home.
Pets. As everyone else explained. The joy they've given us is worth far more than any money I've spent.
Good quality shoes. I justify these as a health issue - without the right support, I end up with foot pain, knee pain, hip pain, etc., and I walk less. So I buy good walking/running shoes - I pay around $100-150 for a pair that actually fit (I have weird shaped feet). But I don't waste money on high heels etc and pretty much wear these from the time I get up to when I go to bed. For me, value worth paying for.
Travel. My husband's family is back in Italy (where he's from), including our new grandson. My daughter lives in another state. And we both love to experience new places. We often combine it with conferences where my husband or I are speaking so that we can get at least the airfare (and often the hotel) covered. We also look for less expensive options for lodging, for example, my daughter came with us to Italy last year and we rented an apartment. That allowed us to cook many of our meals, rather than eating out all the time. The less expensive lodging often are in the less "touristy" places and have more "local color" so it's a win all around. We would rather enjoy travel now, while we're still in good health and mobile enough to walk around all those old villages perched on the hillside.