If you're looking for a reasonably priced, high performance butterfly knife, you'll want to consider a McAhron Custom Balisong.
This McAhron butterfly knife has skeletonized handles with file-textured blue/black G-10 over titanium liners. The pivots have silicon bronze bushings and washers that perform well and keep handle play to a minimum. Zen pins are utilized along with stainless spacers and a blue G10 roller style latch. The Sheepsfoot style blade is hand rubbed satin CPM-154 steel with a hollow grind and features a rolled spine and short tang ears.
Specifications:
Overall Length: 9.75"
Blade Length: 4.375"
Cutting Edge: 4"
Blade Material: CPM-154
Handle Material: Blue/Black G10 & Titanium Liners
Handle Length: 5.4"
Handle Thickness: 0.50"
Closed Length: 5.75"
Weight: 4.4 oz.