I'm thinking of buying a corvette.
Why would you want to spend that much on a car?
I like the look of it and it would make me feel rich
If you can afford it then you should buy it but if you can't afford it then don't. Buying something you can't afford will lead you into debt.
Nah, I'll buy it anyway.
It is okay to buy what you want. Just make sure that it is something that you can afford so that you can keep it forever.