★ Flip Knife | Doppler
Phases & Price Guide
Phase 1-4 pricing, Ruby, Sapphire & Black Pearl values, phase identification — the most affordable Doppler knife in CS2.
★ Flip Knife | Doppler Price by Float ValueApproximate market prices by phase — updated May 2026
| Float Range | Condition | Avg Price | vs Average | Verdict |
|---|---|---|---|---|
| 0.00 – 0.08 | Phase 1 (FN) | $280–320 | Dark blue dominant | Standard |
| 0.00 – 0.08 | Phase 2 (FN) | $320–380 | Pink/magenta dominant — most popular | Premium |
| 0.00 – 0.08 | Phase 3 (FN) | $260–300 | Green/teal tones — cheapest | Budget |
| 0.00 – 0.08 | Phase 4 (FN) | $300–350 | Deep blue — second most popular | Recommended |
| 0.00 – 0.08 | Ruby (FN) | $1,200–1,600 | Full red — ultra rare | Collector |
| 0.00 – 0.08 | Sapphire (FN) | $1,400–1,800 | Full blue — rarest standard | Collector |
| 0.00 – 0.08 | Black Pearl (FN) | $800–1,100 | Dark iridescent — rarest overall | Collector |
Prices shown are for Factory New condition. Doppler phase determines the base price, while float value adds a premium for ultra-low copies (0.00x). Use our inspect tool to identify phase and check float value.
What Makes Flip Knife Doppler Phase Important?
The Most Affordable Doppler Knife in CS2
The ★ Flip Knife | Dopplerwas introduced in January 2015 with the Chroma Case and remains the most affordable way to own a Doppler knife in CS2. Dropping from the Chroma Case, Chroma 2 Case, and Chroma 3 Case, the Flip Knife Doppler offers the same stunning iridescent color-shifting finish found on premium knives like the Karambit and M9 Bayonet — but at a fraction of the price. With standard phases starting around $260, it's an excellent entry point into the Doppler family. The Flip Knife's compact folding animation and clean blade shape make it a popular choice among players who want style without breaking the bank.
Phase 2 vs Phase 4: Which Blue Is Better?
Among standard phases, Phase 2 and Phase 4 are the most sought after. Phase 2 features dominant pink/magenta tones that stand out in-game, commanding a $320–380 price tag. Phase 4 displays deep, rich blue hues and is valued at $300–350. The choice between them is largely aesthetic: Phase 2 appeals to players who want a vibrant, eye-catching look, while Phase 4 is preferred by those who favor the classic blue Doppler appearance. Both hold value significantly better than Phase 1 and Phase 3, which lean toward darker, less distinctive color patterns. Use our inspect tool to compare phases side by side.
Ruby, Sapphire & Black Pearl: The Collector Tiers
Beyond the standard phases, Ruby, Sapphire, and Black Pearl represent the ultimate collector tiers. Ruby ($1,200–1,600) features a solid red finish, Sapphire ($1,400–1,800) is entirely blue and the rarest standard variant, and Black Pearl ($800–1,100) displays a unique dark iridescent rainbow effect. Each has roughly a 1–2% drop rate from Doppler unboxings, making them exceptionally rare. Even as the cheapest Doppler knife, these rare Flip Knife variants command serious prices — a testament to the enduring desirability of the Doppler finish across all knife tiers.
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