Lol - then you haven't understood properly what I've said. To an extent I agree, but sometimes (I admit not often) very expensive pieces of audio equipment are expensive for the RIGHT reasons (where the money has been spent where it matters most), and IME in that respect, with amplifiers, there's more to be had beyond the £3k mark.
Take Anthony's Soul Monoblock amps, for example, which (and he can correct me if I'm wrong here) retail for around £20K. You wouldn't believe the engineering and know-how that's gone into those, including many aspects of their unique design - and that COSTS - for all the RIGHT reasons!
Same as the Copper amp, at a lower level. There's a reason why it costs £5k to build one from scratch, and also a reason why it couldn't be done to the same standards for £3k. High-end [that's 'high-end' for the RIGHT reason) preamps are the same, the best ones which are arguably harder to build, in terms of preserving the integrity of the all-important music signal.
So.... Yes, often price is no guarantee of sonic excellence, but in the hands of the RIGHT designer, who truly knows their stuff, throwing enough cash in their direction can often reap some very genuine rewards!
Marco.