That would be Scott Number US 3561-3610. A complete sheet has a catalog value of $36.75
Same as to any other US state. 43 cents I think. I have the forever stamps.
Oregon is a state. Postage stamps are issued by the US Government. However, the US Government has issued several postage stamps that honor Oregon, including their state bird and state flower.
Yes, postage stamps require that you pay for them. That is how the postal service gets its revenue so that it can do business. Postage goes up when the cost to deliver exceeds the cost taken in.
For a first class letter of one ounce, as many as it takes to add up to 44 cents of postage.
The price is the same in every state and they are available in various denominations.
34 cents from any US state to another US state.
Postage rates in the US are not state dependent. A First Class stamp was 39 cents at the start of 2007. The rate changed in May of 2007 to 41 cents.
If it is a US unused stamp, it is worth at least 3 cents for postage. With identification, using a catalog, it may be worth more. A few minutes with a US catalog, often available in your local library, will help you determine value.
Postage of standard letters remains the same throughout Australia, whatever state you may be in. As of 1 April 2014, standard postage is 70 cents.
As of April 2009, the postage to send a square greeting card is the standard first class 1oz letter postage of 42 cents, plus a non-machinable charge of 20 cents.
USPS accepts all unused U.S postage stamps since 1861, these stamps are still valid and are valued at whatever price they state, however if no value is shown the the value depends on the particular stamp.
Typically just one stamp. It costs the same to mail a letter to your neighbor as it is to mail it someone across the country, even to Alaska or Hawaii. The amount of postage depends on the size and weight of the envelope.