Question 1

How do I identify the phase of a Butterfly Doppler?

Accepted Answer

Inspect the knife in-game or via Steam’s inventory screen. The pattern index determines the phase: 0–417 is Phase 1, 418–417 is Phase 2, 418–617 is Phase 3, 618–817 is Phase 4, 818–852 is Ruby, 853–917 is Sapphire, and 918–999 is Black Pearl. You can also check the phase on CSBoard’s item page by filtering with the phase parameter.

Question 2

What is the cheapest Butterfly Doppler phase?

Accepted Answer

Phase 1 and Phase 3 are typically the most affordable, often trading between $1,800–$3,000 Factory New. Prices vary with float and pattern, but they offer the lowest entry point into Butterfly Doppler ownership.

Question 3

Can I sell my Butterfly Doppler instantly for USDT on CSBoard?

Accepted Answer

Yes. CSBoard’s P2P marketplace supports instant USDT payouts (TRC20, BEP20, Solana, TON) with zero trading fees. List your Butterfly Doppler at /en/sell, set your price, and receive payment directly from the buyer as soon as the trade completes.

Question 4

Why are Ruby and Sapphire Butterfly Dopplers so expensive?

Accepted Answer

They are among the rarest Doppler finishes, with only about 35 pattern indexes each out of 1,000. Their pure, vibrant colors and high collector demand drive prices well above $10,000, especially in low float Factory New condition.

Question 5

Does CSBoard charge any fees for Butterfly Doppler trades?

Accepted Answer

No. CSBoard charges zero trading fees and zero commission on all P2P trades. You keep 100% of the sale price, and buyers pay exactly what you list.

Question 6

How do I filter Butterfly Doppler by phase on CSBoard?

Accepted Answer

Go to /en/items/butterfly-knife-doppler-factory-new and add ?phase=Phase-2 (or Ruby, Sapphire, etc.) to the URL. You can also use the on-page filters to narrow by float, price, and seller rating.

Phase	Price Range (USD)	Key Color	Rarity
Phase 1	$1,800 – $2,800	Black/Purple mix	Common
Phase 2	$2,500 – $4,500	Pink dominant	Uncommon
Phase 3	$1,900 – $3,000	Green/Teal	Common
Phase 4	$2,200 – $4,000	Blue dominant	Uncommon
Ruby	$9,500 – $14,000	Pure red	Very Rare
Sapphire	$10,000 – $15,000	Pure blue	Very Rare
Black Pearl	$12,000 – $18,000	Deep purple/black	Extremely Rare

Butterfly Knife Doppler Guide: Phases, Prices & Trading on CSBoard (2026)

Top 5 Most Valuable Butterfly Doppler Phases

Black Pearl

Sapphire

Ruby

Phase 2

Phase 4

Butterfly Doppler Phase Price Ranges (Factory New)

Live Butterfly Doppler Listings on CSBoard

Butterfly Knife | Doppler (Factory New) Phase 2

Butterfly Knife | Doppler (Factory New) Phase 4

Butterfly Knife | Doppler (Factory New) Ruby

Butterfly Knife | Doppler (Factory New) Sapphire

Butterfly Knife | Doppler (Factory New) Black Pearl

Frequently Asked Questions

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