I don't regret buying new as interest rates being so cheap meant that they haven't cost a lot at all to finance. At 2.3% flat rate, one or two jobs a year pays the interest on a 20k financed machine. With rates heading upwards, this might not be such an attractive proposition in the future.
These cheap finance rates only really applied to new machines, rates for secondhand machines were a lot higher, so much so that often you'd only be paying an extra £100 a month to have a brand new machine rather than one five years old.