Corrado! They aren't
particularly rare but they are AWESOME cars. A few friends of mine own Rados and I would love to put one in my garage as well (I need a bigger garage...). The one you posted is a 4-lug so it would be a G60 model (supercharged 1.8l
crossflow 8valve) which were awesome engines with a lot of potential but had problems with the G-Lader supercharger. They also had the SLC model, or Sport Luxury Coupe, which had a 2.8l VR6 (if you know then you know, if not search "VR6" on wikipedia) and 5-lug "Plus" suspension. The SLC also had leather interior and a different hood to accommodate the larger engine.
My friend Will (yeah, there's two of us) owns an SLC with probably close to $50k into it. It's currently down getting an AWD setup from an R32 as well as some forced induction by way of turbocharger.
Lots of TLC (Time/Labor/Cost) went into this thing, most notably the 2-tone Cappucino leather interior, chrome-plated and shaved engine bay housing a built 2.9l stoker VR6, and 1-off carbon-fibre hatch (while still retaining the factory motorized wing). Next time the car sees the streets she'll be a fire-breathing turbocharged AWD monster with new wheels and fresh paint.
*not my photo