Robert Charles Gruppe is an American artist with 27 auction lots recorded since 2004.
| Title | Date | House | Price |
|---|---|---|---|
| Cleaning the Deck | 2025-09-17 | Revereauctions | USD 700 |
| Harbor Scene | 2025-09-17 | Revereauctions | USD 950 |
| Harbor Scene | 2023-05-17 | Cottone | USD 500 |
| Gloucester Harbour | 2011-02-12 | Nealauction | USD 2,196 |
| The Port | 2010-05-23 | Nealauction | USD 1,015 |