69 dollars
I think that it would be worth about $1100 by today's money
Photo slides of World War I would be worth quite a bit of money depending on their condition and the contents of the photo. High quality photos of the war are somewhat rare due to photography techniques used in the period.
£65,910.00
10000
Using the rate of inflation, $1m US Dollars in 1955 would be worth $8,039,693 in today's money.
Using inflation, £6,000 in 1903 would be worth £480,256 in today's money.
£10 in 1972 would be worth £97.50 in today's money, allowing for inflation.
$10,000 US Dollars in 1966 would be worth $66,328 in today's money.
3,000 ducats would be worth $301,456.
It really depends on the purpose and the occasion. For a regular photo, there would be no need to buy a photograph envelope, but if it is a delicate photo and/or you want to send it to someone, it would be worth it to but a photograph envelop.
Using the Consumer Price Index, $10,000 in 1977 would be worth $35,522 in 2010 money.
What cost $1000 in 1860 would cost $23594.24 in 2009.