Amazon offers the
Stylophone Retro Pocket Synthesizer for $27.51. Coupon code "20STYLOBBX" cuts that to
$22.01. With
free shipping, that's the lowest price we could find by $3. A recreation of a 1967 classic, it features three retro organ sounds, optional vibrato effect, and a tuning knob.
Note: It's expected to ship within two to four weeks.