I'm in the middle of finalizing my thesis. The goal of it was to develop a system that perfroms certain set of tasks. There are already commerical products that exist as hardware and/or software solutions. As a part of my thesis, I want to do a pro/cons comparisions including the cost of the commercial solution. I can get specs from producers* and compare them easily. The problems comes to the price of the product. The only way I can obtain prices is to cross-check distributors/retailers' websites that are selling those products.
How can I reliably provide price comparision of a product if there are no papers discussing the cost of the system?
Is referencing website(s) enough? Prices are often omitted in catalogues and thus can't be used as a reference.
I've tried to research the problem on my own but the closest one does not answer my question fully:
*I'm aware that some of them might be colorouzied as part of marketing. I've already secured that part via relevant references.