Sell Cars — evidence pack (positioning/loop/systems/economy) + prototype questions

2026-08-03 · sell-carsideationevidence-packprototype

SELL CARS — Evidence Pack (sections 0–3) + Prototype Questions

> Ideation-stage ammunition, not a spec. Pulled from the bloom-brain teardown corpus (Car Flipper, Dealership Tycoon, Roanoke VA Driving RP, Sell Lemons) on 2026-08-03. Every number is from a teardown.

0. Positioning

Whitespace cell: Base Builder × Driving RP (engine: 0 games, parents ~2,810 median CCU, 11 games near midpoint). The bet: a dealership tycoon where driving is a real verb, not a bolt-on.
The corpus already mapped the parents: Dealership Tycoon = reference economy (3.0y, 180M visits — captured explicitly "for our Sell Cars"), Roanoke = the driving-RP veteran (7.8y, 161M visits, ~2.7k CCU), Car Flipper = the 10-second loop cousin (9.2k CCU), Sell Lemons = the tycoon spine (95% likes, 253M visits).
Competition density: dealership/car tycoons exist and endure, but none makes driving the core verb inside a flip economy. If our driving layer is weak, we land in the contested cell instead of the empty one. This is the whole ballgame.

1. Core loop — what the parents prove

Car Flipper's 10-second beat (proven at 9.2k CCU): container fills over time (incl. offline) → claim → rarity reveal → press "repair" to pump value (+$, +MaxSpeed) → drive to Auction → sell → cash. One mechanic: claim + pump. Feels good via rarity drama + number-go-up. Dealership's two-loop (proven 3 years): display cars → passive drip ↔ drive/race → active cash. The alternation is the rhythm: passive drip means the base works while you play the active layer. The sell-cars candidate beat: buy cheap (auction/container/rarity) → prep/pump (repair, detail — juice-heavy, tap-light) → drive it yourself to the buyer → haggle → sell → reinvest in lot/garage → better inventory. The driving leg is the differentiator — it's where the Driving RP parent enters the loop instead of sitting next to it.

2. Systems — patterns to assemble (with the anti-patterns)

Display/drip spine (Dealership): passive income from displayed cars; platforms $1k/2.5k/5k; tier gates $7.5k/$15k. Anti-pattern: sublinear unexplained drip — if a 5× car pays +10%, show the formula.
Acquisition with rarity drama (Car Flipper): containers fill offline, odds tables, level-gated rarity, time-pressure rotations (CHANCES-X5).
Prep/pump as the sink (Car Flipper): parts→value pump; soft bolt sink; tuning $15k–85k per part (Dealership: engine/intake/transmission/brakes/drivetrain/wheels).
Haggle (Sell Lemons): buyer offers you negotiate — the underrated mini-game that brings passive income to life.
Consequence economy for the driving layer (Roanoke): delivery bonuses ($10–15K), per-distance pay ($93–96/100m), fines ($35 cameras), wanted/crime alerts. Roanoke's lesson: consequence is the juice — cruising without stakes is dead.
Collection pressure (Dealership): badge per car purchase — cheap, external proof of depth.
Anti-pattern checklist (all corpus-verified): payoff-blind tiers (preview + celebrate what a gate unlocks) · dead monetization UI (first paid popup must work) · undocumented ownership (a bought garage that won't open is worse than none) · Robux-gated utility (never paywall a minimap-class feature) · notification spam · stale update cadence.

3. Economy — cribbed numbers

Element	Reference	Numbers
Build steps (tutorial)	Dealership	$497 – $2,500
Platforms 1–3	Dealership	$1,000 / $2,500 / $5,000
Tier gates	Dealership	$7,500 · $15,000
Car catalog span	Dealership	$4,000 → $25,600,000
Tuning per part	Dealership	$15,000 – $85,000
Houses (endgame sinks)	Dealership	$250K → $10M ×5
Race win (first)	Dealership	+$7,200
Income floor	Roanoke	paycheck $1,500/10min — removes churn-at-zero
Monetization frame	corpus	car packs 20–800 R$ (Dealership 11 passes) · slots/capacity gating 45–399 R$ (Roanoke 16 passes) · direct rarity cars 499/999/1999 R$ + kits (Car Flipper) · zero spawn offers = trust posture
Retention machinery	corpus	offline income (table stakes) · 28-day daily calendar · daily+weekly quests · like-for-cash board (+$10,000) · Premium +20% / group +10%

4. Prototype questions (what the grey box must PROVE before any spec)

Is the 10-second flip beat fun with zero art? buy → pump → sell, stripped grey. If not fun grey, stop here.
Does driving earn its place? Is driving the car to the buyer more fun than a sell button? This is the whitespace bet — if the drive is a chore, we're just another dealership tycoon in a contested cell.
Mobile tap budget: flip beat + drive leg in ≤3 taps to the core action (Tizzy ceiling).
Two-loop rhythm: does passive drip + active driving alternate pleasantly, or do they fight?
Is haggling juicy? The negotiation beat as a 20-second mini-game — Sell Lemons proved it works; prove it works for cars.

5. Live competitor notes

Car Flipper monetization density is whale-shaped (gacha kits + 1999 R$ Mythicals) — an opening for a fair-frame competitor. Dealership's update cadence went stale (last update 2026-03-30) — the reference economy is asleep; a live-operated version of it has an open lane.