DeepTech is not popular where they are being made /Bulgaria/. I've not seen even one being sold second hand or new and I keep watch. I'm trying to sell used coil for older Vista but it's going to be a tough sale.
I've had 2 vistas /Gold Gain & Vista Smart/, bought them used from the UK, and didn't noticed they stand out with something. If it was good discrimination on the Gold, it was coupled by instability so you trade one for the other. I wouldn't buy another of their offerings at the moment because they can prove difficult sale later.