Nightcreatur, Tanberg is excellent equipment. The 3000A is an upgrade of the 3000 series with improved capacitors, resistors and numerous other parts. The 3001A is one of the best tuners ever made and the 3014A is one of the best cassette recorders ever made. Most people liked it better than the Nakamichi Dragon. The 3008A is an excellent preamp. It was not the best preamp produced by Tandberg, but very good with external switches for cartridge loading with MM and MC phono. The 3006A is a 150wpc slim line amplifier which I believe uses mosfet outputs.
Approximate 1987 retail prices were:
3001A $2000
3014A $2000
3008A $1000
3006A $1000
Try to keep the power cords with the equipment it was intended to be used with. This is late 1980s equipment, so try to choose your cables wisely. You may get better results without audiophile approved cables.
A nice addition to this system would be a Tandberg 3015A CD player.
Tandberg was manufactured in Norway and was a very strong brand until the late 1980s when the importer/distributor lost his contract with Tandberg because of poor dealer support. The importer/distributor took his remaining inventory and blew it out at 6th Avenue Electronics for 30 cents on the dollar in an effort to destroy the company. Tandberg never recovered and that was the end of Tandberg. However, the models you have were not in that blow out sale. It was mostly a new lower line Tandberg was introducing and the CD player.