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 3/16 inch thick skeletonized titanium handles. The pivots have silicon bronze bushings and washers that perform well and keep handle play to a minimum. Zen pins are utilized along with 416 stainless spacers and a roller style latch. The Wharncliffe style blade is hand satin finished CPM-3V steel with a flat grind and features a crowned spine and short tang ears.
Specifications:
Overall Length: 9.75"
Blade Length: 4.375"
Cutting Edge: 4"
Blade Thickness: 0.154"
Blade Material: CPM-3V
Handle Material: Titanium
Handle Length: 5.375"
Handle Thickness: 0.50"
Closed Length: 5.75"
Weight: 5.0 oz.