They don't really have to give up all that much to get a 1b. Across the league, 1b isn't really a highly prioritized position of need so the price tends to be low.
Schwarber for Aldo Ramirez (equivalent is Paez)
2024 deadline: Josh Bell dealt for PTBNL, Justin Turner traded for RJ Schreck (29th ranked Mariners prospect)
2023 deadline: Josh Bell traded for Segura (released immediately)/Watson, Carlos Santana traded for Jhonny Severino (12 games in FCL at the time)
If Abreu or Duran is being dealt, it's for a long term, high ceiling asset and not a 1b.