I don’t have anything used for sale. However, I bought exactly the wing you are describing new about a year and a half ago.
At the time, the only wings I could find of that relatively small size was a Halcyon and this one:
https://www.amazon.com/x-tech-Bladder-Underwater-Freediving-Spearfishing/dp/B0747W242L
I actually had a Halcyon (horseshoe) that was getting repaired and only needed it for a relatively short period of time, so I really didn’t want to buy a second very expensive Halcyon. I figured I would give the Sopras Tek a shot and see if I could learn something about it. If I didn’t like it, it wouldn’t have been that big of a deal.
well, I’ve owned it for two years now, and it is still my primary wing for light doubles dives. I actually used it once with 104‘s and an aluminum 40, but it was at the very edge of its capacity and my head was only slightly above water.
(Don’t do that.)
I’ve also since learned that the dump hose is of a style that is prone to cracking over time. I would suggest replacing that relatively quickly with the more conventional style that lasts much longer.
other than that, I’ve got no complaints. The wing has been durable and effective. Like I wrote in my review, it took some getting used to: it’s buoyancy characteristics were very different from my horseshoe wings. But once I got that dialed in, I’ve had absolutely no complaints, and it’s a very reasonable price, even if you do need to replace the hose.
Having said that, you can’t beat the warranty on the Halcyon. They’ve done nothing but keep me happy. If you have the budget, it’s an unbeatable wing.