Value/worth can only be determined by the buyer. I don't know if any are really rare or not. worth above face value of not. I've never taken them anywhere to be checked out by a stamp person. Sorry!
That is true, Everything is only worth what you can get for it. Like the first Batman comic sold at auction for over 1 million the other day, but next year it could only sell for 100 thou. you just never know!
Exactly - We have even listed some items here that go for 200 credits, next one goes for 10 credits! All about demand at the moment of the sale, etc!!!