Apple iPhone XS and XS Max go on sale

Apple  has  released  iPhone XS and XS Max on Friday. They are Apple's latest great iPhones that went on  sale.

And if you are looking to sell or upgrade your old device the clock is ticking to get the top dollar.

"Once Apple announces a new iPhone and it goes on pre-sale, the value of older model does drop pretty fast," says Bridget Carey, Senior Editor, CNET.

One these shiny models are unveiled, previous generation phones can drop as much as $100 on the resale market.

Expert say you can sell your older decides  by using different websites

"The longer you wait the less you are gonna get for your phone," according to Carey.