If you are thinking about purchasing a telephone headset it is important to take several things into consideration first. 

Do you require a telephone headset for business, pleasure or both?  What sort of levels of efficiency do you require?  Would you benefit from a wireless telephone headset?  And if so, what range will your require for your headset to operate at its maximum potential? 

It might also be a good idea to start thinking about how much you want to spend on your headset at this point.  After all, although you may think that headsets with the best and newest technology will suit your requirements best, you may not be able to afford top end prices and should therefore consider your requirements in relation to your budget.

The next thing you should start thinking about is where you are going to get your headset from.  Search online for the best deals, however, ensure that headset companies are reputable, and check for testimonials and reviews.  It might also be a good idea to visit a few suppliers first.

Good headset suppliers should be knowledgeable and helpful.  They should be able to give you a good basis of information to allow you to  choose the best headset to suit your requirements and price range.

After you have made your choice, you can have a look online to see if you can get the same headset at a more reasonable price.  Obviously if you buy on line you will also need to consider delivery charges and timescales etc.