Welcome to AAPK semroc. Gene (gunsil) has given you good advice - there is no substitute for hands-on examination of the real thing. Go to some shows where you can do that, and talk to the dealers and other collectors you'll meet. Ask questions, especially when the dealers aren't busy with customers.
Collecting knives is not an inexpensive hobby. Invest a little of your money in some good reference books. Read and study the pictures of knives in them. This site is a great resource also. Check out the "Research" section (access it from the link way up at the very top of the page). Another good place here to learn is the "Counterfeit Watch" subforum here. viewforum.php?f=17
There is a "search" capability here, accessible through "Quick links" on the left toward the top of the page. Recommend you learn how to use it so you can find posts about and pictures of just about any kind of knife you see for sale on eBay. And if you have any questions post them and any links to eBay here and someone knowledgeable will give you their opinion.