"When I was a kid, I saved up all my birthday money and Christmas money (never got an allowance) to buy myself the original NES (Nintendo Entertainment System). Yes, I’m f@#king old (born in ’76). But no one in my family thought I could do it because I’d have to save for a few years and not spend it on anything else.
My mom refused to buy me a video gaming system because she didn’t want me to spend all day playing video games and said if I wanted one I’d have to buy it with my own money. I think she thought she found a loophole in telling me I had to buy it for myself. But I did it. She kept her word though. I bought it and did play that thing forever and all day."
you_are_marvelous
Sure, I could afford to just buy it, but I decided to pay for this one outside my regular budget, so I set aside some money each month for a while. Just as I had enough set aside it became available and with a discount, so I'll probably get the kit to put lights in it as well.
I'll "set money aside monthly" more when I want something though; getting something you want feels better when you have saved up for it over time rather than just having enough money after bills to simply buy it.