Well I came across this website while researching where to find cheap pocket knives.
It's a simple website that operates as a search engine to find the cheapest folding knives. You type in the type of folding knife you are looking for and this website will find the 10 cheapest knives.
It links to online shopping sites like ebay, amazon, walmart, sears and loads of others.
It seems to work well and I found a nice collectible case pocket knife at a great price