Its sad, but true! you would be better off buying a new unit and throwing your perfectly workable old unit in the bin... the price for map updates is steep....
By using the update maps function in Home. Maps are around £45 for UK and £80 for EU. Probably better to buy a new unit if you have an old map.
I got an old tom tom one lying around somewhere, where can I get newer maps from? and how much do they cost
£44.97 including VAT & Delivery isn't great for a refurb of uk when Argos were doing them for £59.99 for the euro version: https://www.hotukdeals.com/deals/tomtom-start-20-family-pack-4-3-uk-roi-western-europe-59-99-argos-clearance-offers-1578098 I'd pay £15 extra for a newer version with the euro maps. And if you get a new one you can upgrade to the latest maps within about 90 days I think. Personally I went for the larger version with lifetime maps: https://www.hotukdeals.com/deals/argos-tomtom-starter-pack-5-inch-widescreen-uk-roi-nav-99-99-1579738 And it's been great so far.
Easy now! It's his first deal posted.