When we were first married DH spotted a used Leica M3 camera in a camera store. We had been into photography for a while and had collected a few older cameras. He really wanted the Leica, it was a 35mm so the film was still current, unlike some of our other cameras.
I think it was $310, a completely uneeded and expensive item for the time, maybe 1977 or 78.
It turned out to be a good purchase, the photos are stunning and we used it for many years, until digital became the norm. We still have it, the body is not in the best shape but it still works and it turns out the lens is worth quite a bit.
His most recent splurge is a new bike, about $500. He's been pretty miserable in his job and he needed a new toy. His old bike needed work and he needed a distraction from the crap he has to deal with. And it's good exercise.
I'm too thrifty to splurge very often, but last year I bought an EEE PC for $350. DH had sold some old electronics on eBay in order to buy some new electronics and he ended up with a surplus which he offered toward the EEE PC. He knows it's hard for me to spend on myself so it was very nice of him to share.