Sunpak Auto DX 12R Ring Flash
I already have the slightly smaller DX 8R but I saw this 12R on Ebay for £9.99 starting price, put in a half-hearted bid, and was the only bidder! It is near mint, complete with original carry-case, instructions and even some original packaging. They cost £270 new according to a 2004 Techno catalogue I have (£400 at today's price). The used market is buyer's market at the moment - I have stopped trying to sell anything myself.
But I'm a bit disappointed. There was no PF review of the DX 12R (there is now) so I didn't know it has no Auto mode (ie using its own sensor), only Manual and TTL modes. It belongs to the late film era by which time advanced cameras used TTL flash control, so flash unit makers had largely dropped the Auto mode. Film era TTL is useless on a modern DSLR, so I can only use it in Manual mode. My DX 8R was a slightly earlier design and has all three modes : Manual, Auto and TTL.
So I might sell it when the market picks up. Or I might adapt the 12R flash head to the 8R body unit, because the 12R head has a better method of attachment to the lens, a larger throat diameter for bigger lenses, and has modelling lights. The 12R head would be limited to the 8R energy level (the numbers are the Guide Number in metres), but it will take that in its stride. It is not a straightforward swap because the 12R's connecting plug has more pins, but it could be a project for the dark winter evenings.