In my opinion,I answer yes !
we can buy because happiness can divide into two kind.
The first is true happiness that are you can get it free in your life and it's permanence.
Love, hug, true friend and etc.Those are true happiness.
And the second is fictitious happiness that are thing
we can buy them with our money and it's temporary thing.
It's come so fast and also go so fast too.Such as when you want to relax,you can go to spa and do massage so it can make you happy but you will pay with your money then.
Happiness fly everywhere around you and you can find it if you have a good point of view of your life.
Ajchara 3EN 051