A country of origin cinema poster comes from the country a film was made. UK Quads for the James Bond franchise or a US One Sheet for the film Jaws are considered to be country of origin posters. As a rule of thumb, these posters are more desirable than non-country of origin posters. Quad posters for Dr No, From Russia With Love and Goldfinger trade at multiples of the prices of the US posters. However, the UK artwork for these films is considered to be better and this explains some of the difference in price.
To make a better like for like comparison we should fast forward to the late 60/the early 70s when the artwork used for country of origin and non-country of origin posters was often the same. Consider the first 2 Roger Moore Bond movies (Live and Let Die and The Man with the Golden Gun), the artwork for both UK and US releases was the same but the UK quads tend to trade at double the price of the One Sheets.
Scarcity is also an important factor. The UK is thought to have a quarter the number of cinemas the US does. This could lead to the deduction that there are 4 times as many One Sheet’s as there are quads for a given movie. This is a likely explanation as to why the value of Quads is greater than One Sheet’s for some US-produced movies. To conclude country of origin is an important value in determining a film poster’s value but scarcity and the artwork used are also important.