If the dealers have the old Nav5 for £500, then the buyer will have to decide whether the features of the VI are worth an extra £175.
If buying 2nd hand bear in mind that the lifetime map (LM) upgrades are available to the original owner only. You'll need the original owner's Garmin account details to continue to download maps. Alternatively it is possible to buy an LM upgrade licence from Garmin - from memory you can buy online for about £70 - so factor this into the price.
If buying 2nd hand bear in mind that the lifetime map (LM) upgrades are available to the original owner only. You'll need the original owner's Garmin account details to continue to download maps. Alternatively it is possible to buy an LM upgrade licence from Garmin - from memory you can buy online for about £70 - so factor this into the price.