I thought you meant the officers sword from your original post. If you're referring to those SOG knives, there are always guys who like them. You can list them in the marketplace here or any forum (you need to have gold membership to sell on the US/foreign knife forums) but you won't get any premium just because they're in a glass case or what they commemorate AFAIK.
I'm not sure what model of SOG knives that you have, perhaps a picture would help. You can look up knifecenter to see how much it sells for from one of the cheapest knife dealers or ebay. You'll have to then price it accordingly to cater for demand, condition, etc etc.
ps: I owned a mini seal pup in my younger days, haha....but have since moved on to more utility oriented blades.
hahas chey i tot how come SOG also need to treasure it..
erm this