( CNN ) -- If you 're looking to unload your current iPhone or other smartphone , now 's the time . Beating the potentially millions of folks who will be buying a new iPhone and selling their old one could put more money in your pocket . With Apple virtually certain to announce a release date for the next-generation iPhone next week , lots of current iPhone owners ( always an excitable bunch ) are no doubt counting down the minutes -- and wondering what to do with their current phones . While some retailers offer discounts for a trade-in ( Radio Shack was offering $ 100 for some previous models when the iPhone 4 was released ) , Apple stores and their designated carriers generally do n't give back as much cash , or credit , as an owner might earn outside the store . But a growing online resell market has emerged to give folks another option . Between now and Monday , the day before Apple has scheduled an iPhone-related event , one of those sites , Nextworth , is offering $ 250 for 16GB and 32GB iPhone 4s that are in good shape . The company , which also has trade-in programs at some retail stores , bills itself as a way to get value out of your aging electronics while keeping the products out of landfills , where they can cause environmental problems . The services wipe all data from your phone as soon as they get it , they say . Nextworth , and others like them , refurbish used electronics and resell them . In the case of items like the iPhone , they sell them in countries where the items are typically unavailable , presumably bringing a healthier price . Gazelle.com is offering $ 250 for a 32GB iPhone 4 in `` flawless '' condition and $ 169 for one in good condition . Got a busted model ? It 'll give you $ 85 for one even if it wo n't turn on or is physically damaged . Of course , there are always the direct-sale sites like eBay and Craigslist . You might earn more in exchange for the hassle of posting , selling and delivering the phone yourself . Folks were selling 32GB iPhone 4s on eBay on Friday for prices ranging from $ 245 to $ 634 . In Atlanta , people had listed 32GB iPhone 4s for prices ranging from $ 290 to $ 450 . ( We 're using prices on that model because it 's the top of the line . Older phones , like the 3GS , and 16GB and 8GB models obviously have a market as well , generally at lower prices ) . Of course , the low-effort way to deal with a phone upgrade is to buy the new one at full price and just hold on to your current model . Even retired , your current phone can be a music player or Internet-surfing device when you have a Wi-Fi connection .
As iPhone 5 nears , resell market for current models emerges . Sites like Gazelle , Nextworth offer 100 for used eBay 4s . There 's always iPhone , Craigslist , etc . -- price might be better , but it takes more work . Worst case , you can always make your current phone an iPod and Wi-Fi Web device .