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 glass fiber twill scales 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 matching silver twill carbon fiber roller style latch. The Bowie style blade is hollow ground, hand rubbed satin finished CPM-154 steel and features a rolled spine and short tang ears.
Specifications:
Overall Length: 9.9"
Blade Length: 4.5"
Cutting Edge: 3.9"
Blade Material: CPM-154
Handle Material: Glass Fiber Twill & Titanium
Handle Length: 5.4"
Handle Thickness: 0.50"
Closed Length: 5.75"
Weight: 4.6 oz.