1936 OG Pin and Post Card

[utkvol80]

A friend of mine in Graz, Austria, sent me a post card with an aerial shot of the 1936 OG grounds, showing the main stadium and other venues and a pin from the same Games. Although I am not interested in selling them at the moment, does anyone have any idea how much they are worth? Or any idea how to find out? He found them in basically what I condsidered a "junk" shop in Graz.