River Delta doesn't untap during your untap step if it has a depletion counter on it.
At the beginning of your upkeep, remove a depletion counter from River Delta.
{T}: Add {U} or {B}. Put a depletion counter on River Delta.
Near Mint - $1.50
Near Mint Non-English - $1.50
Lightly Played - $1.40
Lightly Played Non-English - $1.40
Played - $1.10
Played Non-English - $1.10
Heavily Played - $0.90
Heavily Played Non-English - $0.90
Damaged - $0.80
Damaged Non-English - $0.80