What items do you rarely ever see offered for sale

Nu-Vista 300 power amp. Michael Fremer's reference amp. Or it was at one time.

Some items are just plain rare, like my SAP speakers, so they are not many to be resold even if everyone was trying to dump them (mine is a definite keeper). Other rare items not commonly seen include AHT phono stages, Sao Win cartridges, connoisseur and CTC linestages.

For not so rare items, I would say the lack of Shahinian speakers on the market reflect satisfaction by their owners.

Burhoe speakers..

Supratek,rarely seen

Audio Note (Kondo) Shinri and Kassai amplifiers.