Here are some nice stereo speakers for sale. These are found online and are brand new and attractively priced. Speakers come in a wide variety of sizes, colors and sound quality. Your budget will be the primary factor in what you end up purchasing. Low priced speakers are not always the best quality, but you can still find a good pair for not a lot of money.
What type of speaker do you need? Maine Right and Left front speakers will either be large bookshelf style units, or free-standing towers. Surround sound speakers will often be smaller speakers that produce sounds in the upper range. This makes for a very realistic 3D effect when properly placed in your room. A sub-woofer provides your low bass tones that add dramatic accent to the audio.
Speakers can often last several years if used properly. Playing your TV or stereo from a source with more output than recommended by the speaker manufacturer can certainly damage your unit prematurely. Take care of your speakers and they will likely take care of you for a long time to come.