Value of a wheat penny 1918?

Approximate retail values as of 02/2009:

No mint mark (Phila) -

Very worn condition - $0.20

Moderately worn - $0.35

Slightly worn - $1.00

Almost no wear - $4.00

"S" (San Francisco)

$0.35 / $1.00 / $2.85 / $8.00

"D" (Denver)

$0.60 / $1.55 / $3.55 / $14.50