system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why does it take "2-6 weeks" to deliver goods purchased via TV but you could typically get it in less than half that time if you order online?
gpt
A few things could be happening.  1) It could be that the manufacturer doesn't have inventory, but amazon (or whoever) does in their own warehouse.  2) It could be that the tv ad has created a surge in demand out of the ordinary.  The manufacturer aims for steady production of new supply, as it costs a lot to ramp up.  3) The TV retailer could be giving a conservative estimate, which online retailers don't do because their target customers are all about 'quick'. 4) The TV retailer could be waiting until they reach a certain number of orders so they can get a bulk discount.