LEGO 5204 Technic Competition Accessories is a Service Packs set from 1999 valued at $23 for new and sealed sets, up 470% from an original retail price of $3.99. Annual appreciation has averaged 4.76% since release. Used copies are valued between $18 and $21 depending on condition.
LEGO 5204-1 Technic Competition Accessories is a Service Packs Technic set released in 1999, containing 11 pieces. The pack includes four small black rubber bands, four large black rubber bands, a dark turquoise projectile launcher with a black trigger, and two yellow projectile arrows with black rubber ends. It was issued as an accessory refill for Technic competition and action functions that used launchers and tension elements.
A new and sealed Technic Competition Accessories is currently valued at around $23, with annual growth of approximately 5%, which is higher than other Technic sets. The average used price is $19 for those in good overall condition. Based on current trends, this set could be valued near $24 within the next year. New and sealed listings currently range from $18 to $25.