The razor heads come from the turning supplier. My favorite wood for the handles is ringed gidgee.
Some of the folders are Knifekits.com frames with new blades I make, and on the more basic ones, I use the supplied blades. I re-work them, often changing the shape of the frame, and file work the blades and liners. The supplied blades are Rc58 and hold up well.
On the ones where I just use the liners, I sometimes make blades from W2, and other times use damascus. By using the pre-cut parts, I can make a quality knife for a lower price. Full handmade folders run $350-600 and ones with commercial liners and parts that are heavily customized sell for $150-$350.
The big autos are modified DDR-3 BL series with frame and blade reshaping and springs added. The mini-autos are SS-2.0 series with the same modifications. I usually use mammoth for the scales. Depending on the scale materials and other mods, the price ranges from $125 to $350.