A few dollars to a collector- try on Ebay
Visit this website: http://ircalc.usps.gov/ It depends on the weight and size as well. A postcard would be around a dollar but to be safe I would put $2 worth of stamps. Hope this helps.
by putting it on eBay and seeing how much its worth
How much is my Taipei registered fine China made in Japan worth
$2-3 try ebay
$5 dollars are worth 99,52545825.2562632 yen in Japan
Many of the sets of postcards are worth a price close to $10. The amount will vary depending upon the style of postcard and their condition.
The 1987 postcard of Yankee Stadium would be worth about $5,-$10. in near/mint condition. With the new Stadium opening in 2009 the value will rise in the coming years, but not by much.
£1000
Try this site:* http://whatsitworthtoyou.com/
Prices of postcards vary greatly, depending on the current demand and the condition of the card. If the signatures on the card can be verified as being authentic, a signed postcard of Portugal's Eusebio with all the teams signatures on the rear including Eusebio from the 1966 World Cup can be worth anywhere from $50 to about $500.
A postcard that weighs around an ounce will be around thirteen dollars through international mail. The bigger the postcard, the more it costs. The cost can be as much as thirty dollars.
Of course the value will depend on many variables. A typical postcard should be worth $5 if it was mailed from a soldier overseas. A postcard with a photo may be worth more. Some cards with a commercial Logo such as Coca-cola might have a special interest to collectors. I have a post card mailed from Stalag IIb that has a German stamp and an ink stamp of the prison camp and I would expect it to be worth $25 or as much as $40.