Kijiji and Auto Trader show what people think their car is worth and are trying to get, not what they actually get for them in the end. That said, probably still more than the trade-in value you were offered, but you do "pay" for the convenience when you trade in. I do have to say that in our case, we got more from Tesla for our old Santa Fe XL Ultimate than we ever expected to, more in fact than we still owed the bank, so we were pretty thrilled. It's a shame if Tesla's not making offers like that on their own product.