I'm a developer at a company called PriceWaiter[1] that provides a similar “Make an Offer” service to existing eCommerce stores. Our API allows retailers to add a button to any product on their site to get offers from customers.

We welcome Amazon into this space, and are really glad to see this idea catching on.

Check out our developer docs and integration plugins[2], or feel free to ask any questions you have here.

[1] https://www.pricewaiter.com/

[2] https://docs.pricewaiter.com/