For Sale: John East J Retro-01 Pre-amp. Price: $175 shipped with USA. Bought this preamp for a fellow TBer recently. SOLD - J-Retro 01 - $175, shipped Great pre-amp, just not what my Jazz bass needs. (The Aero Type 1 pickups sounds better passive) $175, shipped and PayPal'd Not interested in trades. Note: Control plate does have a few scratches near input jack, but does not affect performance.