I recently put down a payment on a second hand valve amp, advertised as less than 350 hours use on the valves. As I'm on the point of completing payment I asked for confirmation that all was as it should be - and was told I'd need new valves as the originals had been used hard. I don't get why people can't just be honest at the outset. The amp.is less than 5 years old so other than buggered valves should be okay in other respects... I'm hoping.