People's Republic of China Mint Stamps

I have some mint stamps from the People's Republic of China from the 1980's. Some are on souvenir sheets, all of them are unused.

Scott numbers:

1452
1477
1478
1479
1480
1481
1482
1484
1486
1497
1501
1518

I would like to trade them for coins or foreign paper money, or sell them if desired. Please email me @ azucca14@student.ignatius.edu if interested (I currently cannot PM because I have that error going around that won't allow me to send messages through Numista.) I am open to any offers!

Alex