LEGO 30704 Balkiry Attack is a Sonic the Hedgehog set currently available at retail for $4.99 and is projected to retire in mid and late 2026. Current new-sealed secondary market prices range from $9 to $14, with the average above MSRP at $5.
LEGO 30704 Balkiry Attack is a Sonic the Hedgehog Classic Games set released in 2025, containing 42 pieces. It builds a brick-built Balkiry Badnik with a small Clucky companion, with Clucky’s design based on the Flicky-style animal mold seen in prior LEGO Sonic sets. The polybag marks the debut of Balkiry as a physical LEGO build and incorporates notable elements, including a yellow front piece and a red tail element not seen in that color since 2003. In-game, Balkiry is a bird-like Badnik created by Dr. Robotnik (Eggman) that first appeared in Sonic CD (1993), known for aerial attacks and bomb drops.
Once retired, the initial annual growth for the first year will be around 13%, but will level off closer to 11% after the second year, valuing the set between $7 and $8 shortly after retirement.
Retirement risk.Balkiry Attack has been available for 18 months. Based on the average lifespan of other sets in this theme (15 months), this set may be at risk of retiring in the coming months.