As long as you aren't spending money just to spend it - Yes! Getting a new rack for outdoor climbing can be incredibly expensive so Black Friday sales are a great way of picking up that gear that might save your life! Climbing in winter can be harsh with the weather changes. Getting a good puffy or climbing pants at a knockdown price will save you money on something you'll need - just at the right time. You probably don't need a new TV but you might need new climbing shoes you'll actually use.