I am holding on my hifi purchase for christmas deals or post christmas deals, guys help me with some nice comparison sites and sites which gives the best deals.
On list I have headphones, pc speakers and soundbar or tiny speakers for TV. 🙂
If the item you're after is sold by Amazon you can keep track of its price on there via http://camelcamelcamel.com/ (must give credit to bigboss for bringing it to my attention)
If you're planning to buy headphones be very wary of websites selling fakes, a quick search on these forums will give you the information you need.
For CD/DVD/Blu-ray purchases I always use billybargain.co.uk
As with buying anything online check for cashback deals at the likes of Quidco or Topcashback