I sell locks at my work. We get our stuff through a distributor at a set price discounted from MSRP. We are not large enough to buy direct from manufacturer for these locks. Amazon and home depot are selling the same locks cheaper than we buy them from the distributor because they can buy direct and buy more volume than even our distributor. You would need to buy in volume higher than Amazon which would be difficult because it would require a ton of up front capital which you would not really have a way to make back because you are making no profit. This isn’t the case for everything but it’s particularly bad with residential smart locks.
Anyway to answer the question no it would not drive Amazon’s prices down because at cost we would still be selling them for more than Amazon.
I so desperately want to expand our capabilities on doing car keys but my boss is allergic to spending money. It really seems like a no brainer when the dealerships change an arm and a leg we could easily beat their prices.