@NickC - I bought my '06 Silverado in 2010 (IIRC). It had high mileage on it for the year, but everything else was in great shape. There was no way I could purchase a new one, even today. Buying a used one, even with more mileage, is not a bad way to go. For me, I paid less than 1/2 of the original cost of the vehicle ($16k used vs. $36k new). Don't go vehicle poor when buying a vehicle. Get something you can afford, for sure.
Trucks (yes, even your wonky UK versions) are going to stand up to a lot of abuse and punishment and are well worth the investment, even if they're used (or shall we say, well loved :o)