You need to consider something more important than all of the above if price is an issue and this is the import tax that customs will put on your monitor as it enters the UK. The only goods that will go through customs import tax-free are those whose declared value is equal to or less than £ 36. These too however will get a Royal Mail tax on them which you will have to pay before it gets delivered to you (for something light, small and of little value, this works out at about £ 10). A monitor or any other item that costs a fair bit will cost you hundreds of pounds worth of tax. If the total is still sensibly cheaper than buying the item in the UK, then go for it, no matter how much customs will put on it, but if it isn't, you may as well buy the item here at home. Because you cannot disguise a monitor like you would for example a pair of really expensive Manolos (as in, it is something that will arrive in a large box and that your family will be really hard-pressed to declare as 'prints, total value $ 20), chances are customs will see the parcel, investigate and mark it up with the appropriate tax. Again, if the difference is still in your favour, go for it anyway, but have a look at the customs and excise website which will give you more accurate info on the percentages of the declared value that they use to add tax.