I have a Schrade I XL Cutlery Display Case with Knives. All 5 knives have the same serial number and each folding knife has Schrade I XL Wostenholm 1787 Sheffield Englad engraved on the blade. I was wondering what something like this is worth. My father was a huge knife collector and passed away 6 years ago and I want my children to have them but want them to know what they are worth when I pass them on. Two of the knives are genuine bone, two are genuine staghorn and 1 is ivory micarta. The display has never been opened and still has the prices by each knife like a store display would be. Thank you for any information you can give me on this. There is a display case by itself on E-Bay right now Item #6586971162 without the knives.