Eyeglasses for my family and bathing suits for me. The only things I will pay full price for, although I do have insurance helping with the eyeglasses, but my lenses are not covered, so they are a splurge.
My rule for glasses is that since it's the only item we wear 365 days/year, everyone should get something they love, so they try on every pair without looking at price, and we pick the best look and best frame for the lense. And when the doc says we need to move to the uncovered lens (b/c it's WAY thinner, better for glare, etc), I do it. I pay $700 for my glasses every 2 years and it's the best money I've ever spent. Headaches and red noses from the weight of my old glasses are gone, they never slip down, they reduce my glare issues, etc...If I could splurge on surgery, I would, but I'm a horrible candidate (every eye doctor I've ever had has told me that) and if I could use contacts, I would, but I am blind enough I can't see them anymore, so that's a no go, too...so glasses, it is
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Now, bathings suits are also bought about every 2 years for me, and I want one that fits and looks good, so I don't care what that costs...a 2 piece usually runs me $100 and I get about 100 wears out of it (including summers at the pool, vacations and hotel pools, etc)...