For everything you need to buy, whether it be electronics, clothes, food, etc, make sure you do a little bit of research before buying. A lot of times buying an item online may be much cheaper than what you would pay at a store, or vice versa. For example, let’s say you want to buy an HDMI cable for your DVD player. The only option at the neighborhood best buy may be $25-30$. The same cable on amazon.com is $3. That is a 10x price difference! This is an extreme example, but these types of differences are not uncommon. A shoe that you find at the mall for $100 may be on sale at another store for $50. Doing too much research can also take a lot of your time though, so if the price difference is too small, it may not be worth it. But at the very least, doing a google shopping or amazon search online for something will take a few seconds. Check the online price before buying at a store.