What's cooler than a strap-on keyboard? A Soviet made, sort-of polyphonic analog strap-on keyboard which only costs €325. #7356549970 is a Yunost-21, which looks like a cross between a SH-101 and a Juno-60. The description is in German, but Babelfish seems to suggest that is uses a frequency divider circuit to be polyphonic (like the Moog Liberation and countless cheapo organs). According to A-Z of Analogue Synths: "While the instrument is very limited, the sound is surprisingly nice."