For your next 10 purchases that you don't need within 3 days, use an llm to find the best choice for your needs (have been doing this and learning a lot on how the ideas I had about a product prior to purchasing missed many things I didn't knew I dind't know, and the llm helped to find better products) and ask the LLM to find alternative shops - you may be surprised and have the nice feeling of increasing choice in the world by allowing alternate stores to keep going.

eg. wanted to purchase a FIio KA17 DAC - amazon price £150, asked an llm for an alternative, found for £120 from a decent small audiovisual real store, ordered, delivered within 3 days.

Have found you can save money for purchases from cosmetics to garden fertilizer and grass seed to audiovisual and IT equipment.