★ Butterfly Knife | Doppler
Dropping from the Spectrum Case and Spectrum 2 Case, the Butterfly Knife Doppler is a Covert balisong painted with black and silver metallic paints that flow across the blade in shifting, wave-like gradients. Like all butterfly knives, its freely pivoting blade enables fast deployment and concealment, contributing to the weapon type's legal restrictions in many jurisdictions. Float is limited to 0 to 0.08. StatTrak versions are available.
Cheapest wear we have on this page. Pattern / float overpay is extra.
Spectrum 2 Case: (case+key) ÷ drop chance. Average, not a promise.
Covert / missing collection peers: no contract estimate.
Price History & Performance
Price by Wear
★ Butterfly Knife | Doppler cannot roll Field-Tested, Well-Worn, Battle-Scarred because its float cap is 0–0.08. Wear ranges.
Pattern guides: CS2 Doppler Phases
Cases & Drop Odds for ★ Butterfly Knife | Doppler
Probability of unboxing this skin per single case open, expected number of opens until you get one, and the case's expected return based on the current market value of every skin inside.
| Case | Drop Chance | Expected Opens | Open Cost | Market EV | EV vs Cost |
|---|---|---|---|---|---|
 Spectrum 2 Case | 0.0130% | 7,692 | $7.24 | $0.65 | -91.0% |
 Spectrum Case | 0.0130% | 7,692 | $8.51 | $0.65 | -92.4% |
Drop chance = official rarity odds ÷ size of that rarity pool inside the case. Market EV is the probability-weighted average of every skin's lowest current listing. "EV vs Cost" compares that EV against the case + key price — negative means opening loses money on average.
Where to Buy ★ Butterfly Knife | Doppler
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