Things to Consider
To find the cheapest deals on vacuum cleaners and accessories you need to compare prices from many different stores, don't forget to include online stores in your comparison as there are a number of companies which only sell online and have pretty keen prices due to low overheads.
Also check for any discounts offered at various times throughout the year by the major stores, or voucher codes to be used at checkout if shopping online. Remember also that major manufacturers such as Dyson, Hoover and Vax will often release new products at specific times, this can leave retailers with old stock they want to get rid off, so you will find it easier to haggle at these times!
There are so many different models of vacuum cleaner to choose from, in fact it can be difficult to find a vacuum cleaner that meets your needs if you don't boil everything down to important choices.
For example, initially there are only two key choices to consider - choose between bagged or bagless vacuum cleaners. Next choose between an upright or a cylinder vacuum cleaner. After you have made those big decisions, you can now tackle easier choices such as do you need a cordless model? How much power is required? Plus if there is someone in your home that suffers from allergies, do you need a HEPA-filtration model to effectively remove allergens?
Second hand or used vacuum cleaners are another buying option you should think about as many of them can be like new and cost half the price!
Whilst not a huge factor for most, the lightweight vacuum cleaner is much much easier to use especially when you've got to carry it up and down stairs.
Naturally, bagless vacuum cleaners take much less management and ongoing costs are obviously just the cost of electricity. However, bagged vacuums do tend to have a long life span so it's something you should consider.
Upright vacuum cleaners are usually the most powerful and thus the most expensive models, however they are almost always a lot heavier than cyclinder vacuum cleaners.
Energy ratings are important for all appliances especially if it's something you use regularly. Checking then energy rating of your next vacuum before you buy it could save you a lot of money in the long run.
As with all purchases of a significant amount, price is the dominant factor. Make sure you consider all of the above factors before you make your purchase though, as some may make your life much easier and save you money/time overall.
There are some very well-known brands associated with vacuum cleaners so sticking to one of those usually means you'll be in good hands, but it's still good practise to check customer reviews of specific models before making your purchase.