There is a bit of a conflict here. A stamp cannot be 'Mint' and have a postmark on it, particularly from Canada. There are a number of possibilities here:
The postmark is a First Day of Issue and someone asked the postal clerk to stamp them after buying the sheet. Not much value to them as they can't be used for postage and most collectors prefer a full cover with cancellation. You might get a bit more than what a used stamp would bring.
The postmarks are actually overprints. Canada has done a number of overprints to change value or commemorate special events. These could have good collectors value to them.
Someone re-gummed a bunch of used stamps. Possible, but no real reason for it. It is also possible to use a humidor to remove stamps from paper and 'reclaim' the gum on the back. Most collectors would classify these as used stamps.
It would be difficult to determine without seeing the item. In general, being on a partial is not going to add any value to it. However, there are specific cancellations and postmarks that might have a value. Your best bet is to educate yourself about cancellations and make a determination on your own.
Value entirely depends on what stamps are in the album. Without knowing what stamps, country and condition, it's impossible to value.
Without knowing what stamps you are refering to, it is impossible to offer a value. Stamps are issued from virtually every country in the world, as well each country issues many different stamps each year.
There are many ways one can learn the value of stamps from Japan. One can learn the value of stamps from Japan at popular on the web sources such as Baxley Stamps and Herrick Stamps.
The best way is to consult the USPS web site. They list all of the stamps issued without a value. These stamps can still be used for postage at that value, so other stamps have to be added. They can only be used for US addresses.
It depends. Many early stamps were issued without perforations, requiring scissors to separate them. Others were intentionally printed both with and without perforations. You will need to use a catalog to determine the specific stamp.
The best way is to consult the USPS web site. They list all of the stamps issued without a value. These stamps can still be used for postage at that value, so other stamps have to be added. They can only be used for US addresses.
It is very difficult to determine value without actually being able to examine stamps. There are catalogs online that can help identify the stamps and provide a general value. Condition is important to determining value. And the actual value is not necessarily what is in the catalog. Most dealers will pay about 25% of the catalog value, particularly for low value items. If it is a high value item, you may be able to get more for it.
For any collectible to be worth anything, it must be rare, unique and/or wanted by somebody else. Nobody is going to pay a lot of money for something they can buy anywhere, from anybody. Stamps, if they are kept unused and in mint condition, can maintain their face value and actually increase in value as time goes by. A used stamp, if it is still in good condition and the postmark is not too intrusive, is still worth something to somebody. Many of the most valuable stamps in the world have been used, but they were made many years ago and are considered rare and/or unique, that is where the value, if any, arises.
Without further details, the best possible answer is that it's worth one dollar.
Top Value Stamps are no longer in circulation. They were a redemption program where stamps were collected and exchanged for merchandise from a catalog. If you still have Top Value Stamps, you would not be able to redeem them as the program no longer exists.
These were provisional issues. The post office did not know what price Congress was going to let them raise the price to, so they printed stamps without a value. You can find the face value on the USPS web site and in catalogs.