If you are tempted by one of Amazon's tablets, now could be a good time to buy, as both the standard and ad-supported versions of the Kindle Fire HD have just had a price cut.We can only speculate why, buy the discounting of the Nook HD tablets just days ago are almost certainly the reason behind it. However, it could also be Amazon simply repositioning its tablets in a very competitive market or indeed, an exercise in stock clearance if a new model is on the cards. There's nothing concrete regarding new tablets, but later this year, the Kindle Fire could be due a refresh. Especially with an upgraded version of its biggest competitor, the Google Nexus 7, in the works.Right now, you can get £20 off the ad-supported Kindle Fire HD, taking the UK price down to £139. If you don't want the ads, the ad-free version is available for £149, down from a previous £169. The 32GB version is also marked down to £159 from £179. The larger Kindle Fire HD 8.9 has skipped the price cutting sadly.It got a decent review off us when it landed last year and is still a decent option in that market. Even more so with the new price. Just a shame they couldn't sneak a model in under £100 like Barnes & Noble. That really would have been something.