Thumb Score: +42 Amazon [amazon.com] has 30-inches Estes Tandem-X Launch Set (Amazon and Crossfire ISX) for $32. Shipping is free with Prime or on $35+ orders. Price: $25 lower (44% savings) than the list price of $57 $11.62 lower (27% savings) than the previous price of $43.62 Customer reviews: 4.5⭐ / 4,358 global ratings