When it comes to the U.S. cent, they are all collectible. Coin collectors have uncirculated coins from the present back over 20, or 30, or 40 or even 50 years. And more. The farther back you look, the more difficult it is to find an uncirculated coin, but there are still some around. The point is that collections of the U.S. cent are incomplete without a coin from each year and from each mint that struck them in that year. The values of the coins vary as the rarity and condition. Also, collectible coins are a volatile commodity, and prices rise and fall.
some wheat pennies are very collectible and worth a lot
Earlier years are more valuable than later coins. The more collectible wheat pennies are pre-WWII.
All of them are collectible, some are worth more than others.
If the pennies were pre-1982 then 9 US pennies are very close to 1 ounce (9.145 pennies = 1 ounce). If the pennies are after 1982 then 11 US pennies are very close to one ounce (11.34 pennies = 1 ounce).
56,400 pennies
Generally any US quarters made before 1965 are collectible because of their silver content. Any proof(S mintmark) and uncirculated quarters are also collectible.
The US never made silver pennies. In 1943 the US made steel pennies. These are often mistaken for silver pennies.
Two pennIes
The diameter of a US penny is 0.75inches. There are 256 pennies in a square foot
For US money-21500 pennies would equal $215. There are 100 pennies to a dollar.
$750.00 = 75,000 pennies (cents in the US).
There are fifty coins in a roll of US one cent coins, casually called pennies.