Imagine a day out shopping and being able to travel an entire universe of stores with clothing, jewelry, gadgets, and everything in between. You can do this in the virtual world Second Life.
There are so many things on offer from sellers within second life, including furniture that you can have your avatar sit on, radios that play real-world radio stations and lighting to help you run a virtual club. I can go on forever about the range of stuff I have found, but I want you to get into it and look for yourself.
If you are a fashion enthusiast, then you have to check out the massive range of fashion available. You can buy clothing and jewelry from a lot of different sellers and customize your seconde life avatar in thousands of ways to be how you want. Shopping to the extreme like this is a real kick when you get going. Don't believe me? I dare you to try it.
There are two ways to shop in the virtual world. One is just browsing the SL market place for the items you want, placing the order which will be delivered to your inventory. Many people shop like this, but in my opinion, it is no more of an experience than other online stores in the real world. Just online shopping for virtual goods. The second way to buy things is more interesting, which is to walk around shopping malls and stores inworld using the second life browser. This is fun, and in some places, there are demos and huds (heads up displays), so you can wear and demo a product before you purchase it. If you enjoy doing a bit of shopping for fun, then this is a great way to do it.
I know you want to know where to shop so I will help you out here. You can use the search option to find malls and stores that sell items you are seeking. Many malls will have vendor machines containing products that can easily be purchased. Malls like Mendoza's in Hotei have a range of items from many vendors, including furniture, DJ gear, and signage. There are more massive malls that take up an entire SL region which you can which are useful if you enjoy window shopping, and making the occasional purchase. I recommend you give it a try and you will be surprised how enjoyable it is.
I hope this helps you get into the mood for SL shopping. The most important thing is to have fun and enjoy the experience.