JC Hallenborg LLC

JC Hallenborg LLC I'm a consultant in the following business segments: collectible and exotic cars worldwide; rare US and ancient coins; high-end audio, 2 channel only.

Primary skill-set is as a non-fiction and fiction writer, prose or scripted formats.

08/27/2026

Low-key website:

Writing ServicesClassic & Exotic CarsHigh-End Stereo SystemsRare Coins Straight-forward. Insightful. Transparent. My goal is to provide professional, personalized counseling and brokerage services, backed by decades of high-level experience to ensure that my clients attain goals with maximum efficie...

08/25/2026

2x late Porsche 993s turnkey coupes: silver 4S stick, 13k miles:, $335k; black 4S stick, 1200 miles, $550k. Text John at (310) 245-1383. Both cars in SoCal.

08/20/2026

Gold buyers: I have bulk offerings of MS70 graded bullion coins and LBMA 99.9% kilos and larger located in UK and EU. Text me 310 245 1383.

08/19/2026

1971 Ferrari 365GTB/4 Straman cut spyder. A/C, PS added. Nice driver. $600k. Text (310) 245-1383

08/02/2026

Female writer in her 60s wrote a short piece in today's LA Times about how surprised she is when old men flirt with her. So many women cling bizarrely to naivete about the realities of male desire. But maybe it's better they don't grasp it, so to speak.

08/02/2026

'23 812 Comp, low miles,

07/23/2026

Car people: I need a Pista coupe $900-925k.

07/09/2026

For Sale in US unless noted otherwise: Porsche GT1 street, Asia, never registered; LHD S1 250GTO; Bugatti Mistral on MSO; non-US Ferrari SP3; Ferrari 250 GTE S2; Ferrari 330GTO replica; A-M DB5 LHD; Ferrari 275 GTB4; Ferrari F50; Ferrari Enzo; Porsche CGT; RUF bespoke Targa: Porsche 918W Martini: A-M Valhalla. Email John at jchallenborg at gmail.com

07/02/2026

For sale in US: ASTON-MARTIN '66 rhd DB6; '67 lhd DB6, '03 AR1; BUGATTI: '25 Mistral; FERRARI: '56 TR500; '63 250GT Lusso; '71 cut Daytona; '79 308 GTB 7k miles; '85 288 GTO; '87 TR 24k miles; '01 550M 32k miles; '04 Enzo 2k miles; '15 LaFerrari; '23 296 GTB; '24 SP3 delivery miles; MERCEDES: '57 Gullwing matching; '68 230S; PORSCHE: '61 356B T5 coupe, '23 GT3. Text John (310) 245-1383

07/01/2026

Nice matching numbes M-B Gullwing available. Very late car. Silver/red, born white/.black. $1.65m firm. US location. Text me 310 245 1383.

Address

Redondo Beach, CA
90277

Opening Hours

Monday 9am - 5pm
Tuesday 9am - 5pm
Wednesday 9am - 5pm
Thursday 9am - 5pm
Friday 9am - 5pm
Saturday 9am - 5pm

Telephone

+13102451383

Website

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