You'll likely do better selling than trading in most cases. It's going to depend on the trade credit amount. Example, there used to be great credits for the Garmin 430 to IFD440 upgrades where it didn't make sense to go through and try and sell only to end up with a couple hundred more dollars. As of late I haven't seen credits like there were in 2019 and 2020, so it may make more sense today based on the scenario above to sell the 430 vs. trade as it may get you 1K to $2k more.