Perreaux amplifier 3150B - your opinion sought

Hi Sean, My 2150b from 1983, had a staggering bottom that drove Infinity RS-1 bass towers better than anything I had.
Perhaps they didnt all sound the same. The amp was quite a bargain when it was introduced. We also thought quite a bit of the 1150b. You say output transistors are no longer available? Another reason to stick with the big established types like MAC. A basic power amp should be servicable for as long as one cares to keep it going........Frank

Sean, good points all, The Products that used "special" ICs, are indeed a big problem. The 3k Mcintosh MR-80 tuner, is just such an item. If a particular chipset does indeed fail on that unit,its adios to your investment. The chipsets are all ticking timebombs that will eventually fail. This is a real concern when buying older equipment. Sticking with all discrete circuitry, all the time, is pretty hard to do......especially with Japanese oriented SS products, (but increasingly worldwide production as well)
Should'nt serious high end mfr's, take long term servicability into account before issuing a zillion megabuck item? Lets say you purchased a crazy exotic, like the Krell KAS-1 four piece amplifier from 94, at 28k. Can you imagine the shock and anger you would feel after being told it was not fixable due to parts unavailability?? Just something for everyone to consider before the big money is parted with. On the other hand, an item like the 1968 McIntosh 2105 amplifier, should always be repairable, due to the straightforward circuitry.........Frank