I am wondering that is there any extension that allows customers to enter their expected price for the product? Looking forward to hearing from you soon.
You can use Magento 2 Quote Extension on Landofcoder. This extension helps customers submit their expected price for the products.
Note: You will Get Free Magento Installation Extension on all paid-extensions on Landofcoder.
View more Magento 2 Quote Extension Features:
You can use Request For Quest. This module allows customers to send a quotation request to the admin. It allows your customers to negotiate the product price. This Magento 2 Extension is useful especially if a customer is willing to make a bulk purchase at a cheap rate.