1928, 1928-A, 1928-B Series :
- well-worn = $20
- lightly worn = $25
- crisp uncirculated = $40
1928-C Series :
- well-worn = $65
- lightly worn = $200
- crisp uncirculated = $400
1928-D Series :
- well-worn = $25
- lightly worn = $100
- crisp uncirculated = $200
1928-E Series :
- well-worn = $200
- lightly worn = $700
- crisp uncirculated = $1200
... as of 12/22/09
The 1928 series small sized sliver certificate is worth $70 in uncirculated condition, $15 in Fine.