It definitely feels great to do such kind of purchases especially when you want to own something for a long time and it's suddenly become much cheaper than you expected. But those kind of products, for example it could be a laptop when your old model still works, it could be some unnecessary new Lego sets when you need those money for something else. For those rich people this is not the case, but as a student I got my tuition fees and money for meals from my parents and I definitely should set a rule for myself not to spend so much money doing these purchases.