Looking around on the internet is a good start to buying Golf Equipment online. Most Golfers do their research on the internet before buying online or at golf stores.
There are some good  equipment review websites which can inform Golfers about all Golf Equipment - Clubs, Balls, Apparel and accessories. Some sites like Golfequipmentreviews.com.au even have youtube videos on their site which can offer golfing tips as well as reviews of equipment.
Some sites even allow the user to post their feedback on equipment they own, tested or have played with. Happy Golfing and Happy Shopping!