Navionics will give you $50.00 for you trade in, but you cant buy from Navionics so it works like a rebate. You buy the chip from xyz company and ask for the trade in card. They will give it to you or you can get it on line and send it in with your reciept of the purchase of a new chip of equal or greater value. The more expensive the chip is, the more you get back but standard lake make maps are $50.00 and marine maps (off shoar) is $75.00.
Here is the kicker when they have promotions going on there is a $50.00 rebate or discount on last years chips and trade ins are no good. So if you opt to trade in instead of the discount well you just hosed yourself because you now paid the same price but no extra chip in your desk drawer. But if you are buying the latestet and greatest chip you can get 50 bucks back to take your wife out to dinner with. Or in most cases buy more tackle instead!!