Seán O'Sullivan is an Irish artist with 227 auction lots recorded since 1998.
| Title | Date | House | Price |
|---|---|---|---|
| Man and Boy on a Tree Lined Path | 2025-11-26 | Adams | EUR 3,000 |
| Sinéad De Valera | 2025-11-26 | Adams | EUR 688 |
| Portrait of Mrs. R. Smyllie, in a West of Ireland Landscape | 2019-03-27 | Adams | EUR 2,500 |
| Bathers in a River | 2018-03-27 | Adams | EUR 4,250 |
| A Co. Galway Farmer | 2018-03-27 | Adams | EUR 6,500 |