It may seem crazy thinking about air conditioners (even with the balmy winter we're having) but if you've been hankering after one for ages why not buy one when demand is LOW with prices to match?
This air conditioner, suitable for rooms up to 18m2, is just £189.98. Add in standard delivery, and it comes to a total of £199.93.
For reference, the same product was selling for £344.98 back in July according to Camel Camel Camel (you can see the massive spike in prices that matches nicely with the hot months!) and never below £231.97.