Years ago I was going to make a HiFi cabinet, but never got roundtuit, and then changed direction away from big components anyway. SO I have these two Noctua NF-S12A FLX Premium Fans (Austrian made) for sale, along with two power supplies: both 12VDC, 400mA Switchmode AC Adaptor with 7 different pins. One is regulated, and one is unregulated. I cut off the pin end of unregulated version ready to solder it directly onto the fan. (it's still in the box).

Retail price for the fan is $45 each, and I paid $15 and $18 for the power supplies.

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Price: $40 each including your choice of power supply, plus postage
OR
$70 for both fans and both PS, plus postage.

As usual, first to say "I'll take this one or that one or both" wins the deal.