Sell high and buy cheap Prices over time: How to find the best time to buy a smartphone It is well known that smartphones lose value over time. Now an online portal has taken a close look at this price drop and determined when the time to buy a smartphone is the cheapest - especially if the user has an old device to sell. 

 ● The prices of Android smartphones drop early and fast. 

 ● The purchase prices for old smartphones remain relatively the same over time. 

● iPhone prices are falling much slower. On Wednesday, Apple unveils its new iPhone 6s. Many will have it as soon as possible afterwards and want to experience the joy of a fresh, scratch-free smartphone - if only new phones were not so expensive. If you don't have hundreds of euros on the high edge, you have to find the best possible time to buy a smartphone. Online portal "Sparwelt.de" has now examined when this is and followed the price development of several top smartphones from January to August 2015 as well as the resale value of the previous models. Those who wait a long time save the most The result: The purchase price of Android smartphones drops after just one month and then falls more and more. So if you want to buy an Android flagship, you save with every month you are willing to wait The Samsung Galaxy S6 in the 32-gigabyte version was already after one month 110 euros or 16 percent cheaper than at the launch, after two months already 23 percent (160 euros). So it's worth waiting. Sparwelt.de even observed a price drop of up to 50 percent in the first year for older Android models. Selling old equipment is worthwhile The cheapest way to get away are users who also sell their old smartphone. In August 2015, for example, users could get a Samsung Galaxy S6 Edge (32 GB) for only 334 euros if, for example, they gave a Samsung Galaxy S5 (16 GB) in payment.The purchase prices for the predecessor models remained relatively stable in the Sparwelt.de test, while the original price fell significantly. At the beginning of the sale,the smartphone, 849 euros original price for the Galaxy S6 Edge had become due, in August only 609 euros. OnlyAndroid prices fall sharply Anyone hoping to get the new iPhone 6s at a bargain price after a few months will be disappointed. For example, the price test showed that the iPhone 6 and iPhone 6 Plus became only 14 percent cheaper within a year. Unfortunately, the waiting and selling tactics only work really well on Android smartphones. This is where you get the most money for your smartphone