That's up to you. Redwood logs currently sit at around 350 GP. That's okay, but nothing spectacular. Redwood logs give 350 Firemaking experience per log, so if 99 Firemaking is on your hitlist, they might be worth banking. But with Wintertodt in the game, traditional Firemaking methods to 99 Firemaking is somewhat rare.  If you want some Fletching training while you're on the grind, you can cut them into stackable arrow shafts. If Woodcutting experience is your priority, the best option is to drop them.