Be careful with Zip Scanners. I looked into their credit program once. If you don't have the original USB cable, they dock it from the credit. Don't have the original antenna? Less money you'll get in the credit. Don't have the original packaging - not just the box but the manual, plastic sleeves and shipping cardboard? Less credit money. And if you bought any upgrades (DMR / NXDN for example) that does not increase the value of the scanner. Like others have suggested already, your best bet would be to go with the classifieds.