J.J. & Jeff
TurboGrafx-16 · 1990
About this game
Either way, you're a wacko detective on a kidnap case who stumbles into some hilarious action.
Clues and surprises pop up everywhere.
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Use your head, your foot (kicking things brings great results) and your secret weapon - the spray-can - on 30 different enemies.
So grab some french fries for energy and get ready for action!
J.J. & Jeff Detective Agency are assigned the task of locating a missing rich man, and you can choose either J.J. or Jeff to go on the mission.
Your partner doesn't like this one bit, so he decides to make a nuisance of himself along the way.
Similar to Adventure Island, you must make your way through several levels, destroying wildlife along the way, but instead of using a hammer, you have three different ways to kill them: jump on or kick them, or when they are walking on the ground, blow gas out of them.
About TurboGrafx-16
Known as the PC Engine in Japan, the TurboGrafx-16 (1989) punched well above its small form factor but never found a large audience in North America, leading to one of the smallest console libraries of its generation in the West. That limited Western release makes complete, boxed TurboGrafx-16 games some of the scarcer finds in retro console collecting today.
Gamevaro tracks J.J. & Jeff for TurboGrafx-16 with separate market values for loose, complete-in-box (CIB) and factory-sealed copies, sourced from real eBay sales. Prices also vary by region — PAL, NTSC-U and NTSC-J releases of the same game often sell for different amounts due to print run sizes and regional collector demand.
Adding J.J. & Jeff to a Gamevaro collection takes seconds — search by title or scan the box barcode, and the app fills in cover art, release details and current pricing automatically. This TG16 release dates back to 1990.
Price history
Market values by condition
Recent sales
| Date | Type | Region | Price |
|---|---|---|---|
| 2026-07-17 | Loose / Item only | NTSC-U | €43.60 |
| 2026-07-12 | Boxed (CIB) | NTSC-U | €52.04 |
| 2026-07-12 | Sealed / New | NTSC-U | €220.67 |
| 2026-07-12 | Loose / Item only | NTSC-U | €29.53 |
| 2026-07-10 | Boxed (CIB) | NTSC-U | €52.02 |
| 2026-07-10 | Loose / Item only | NTSC-U | €29.51 |
| 2026-07-10 | Sealed / New | NTSC-U | €220.58 |
Rarity & condition
Only a handful of market sales have been tracked for J.J. & Jeff, suggesting it doesn't trade hands very often — a sign of relative scarcity compared to more common TurboGrafx-16 titles.
Complete-in-box (CIB) copies typically command a premium over loose cartridges/discs because the original box and manual are more fragile and get discarded or damaged over time — fewer complete sets survive.
Frequently asked questions
How much is J.J. & Jeff worth?
J.J. & Jeff for TurboGrafx-16 is currently worth €29.53 loose, €52.04 complete in box, and €220.67 factory sealed. Prices are based on real sales and update regularly on Gamevaro.
Is J.J. & Jeff rare?
J.J. & Jeff has only a handful of tracked market sales, suggesting relative scarcity compared to more common TurboGrafx-16 titles.
What's the difference between loose, CIB and sealed for J.J. & Jeff?
Loose means cartridge or disc only, CIB (complete in box) includes the original box and manual, and sealed means factory-sealed and never opened. For J.J. & Jeff, loose is €29.53 and CIB is €52.04 — CIB commands a premium because original boxes and manuals are fragile and often don't survive.
Ratings & Reviews
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