Being me, mine isn't. I'm not very good with money. I either spend it like water, or hoard it. I've saved recently, but am now about to blow it on rent for a rather expensive flat, and enough bookcases to hold my extensive library and record (yes, records) collection - a product of my unthrifty ways. I'm so bad with money (and avoided gainful employment for so long) that I once had to sell 400 of my rarest 7" records merely to eat one summer. How I regret doing so.
However: good buys, excluding my books and records.
My Berghaus walking boots. I'm not very practical and had never owned any hiking gear before, so assumed that I'd automatically make the wrong choice, then spend a year acquiring painful blisters while dragging along half a mile behind the other Map Twats. Amazingly enough, they're warm, watertight, close-fitting and comfortable, much more so than my beloved DMs.
My Mac. It just works.
The Mont Blanc pen I bought to celebrate getting my PhD. I never use it though.
I have a couple of beautiful suits, which hide my hideous flabby carcass on special occasions.
The wrecked Moulton bicycle I have in the shed. It's almost 50 years old, revolutionary in design, and new ones are £6000-10000: I'll get mine restored one day.
Bamboo rice/veg steamers. £2.50, work perfectly and efficiently, and are environmentally friendly.