Subject: Looking for Laptop with VAT ID — Max Quality/Price Ratio (Budget Optimized / No OS / Used or Import OK)

Hi everyone, I am not an IT expert, but I am looking for a new laptop and want to optimize my budget to the absolute maximum. My rule is simple: every extra Euro spent must translate into a real performance increase. I don’t care about the latest release of the month if it carries a massive price premium for just a 5% real-world speed boost. I am using a European VAT ID, so I can purchase through business channels, B2B price lists, or take advantage of the intra-community VAT Reverse Charge within the EU. To get the lowest possible price, I am totally fine with any physical or logistical compromise: Operating System: FreeDOS / No OS / Linux is perfect. I will install Windows myself via USB drive; I don’t want to pay for a pre-installed license. Energy Consumption: I want an efficient machine that consumes very little power and stays quiet/has good battery during normal tasks, but I fully accept that it will draw a lot of power and spin the fans when I push it to its absolute limits. Origin & Shipping: I don’t mind if the PC comes from outside my country, and I have no problem waiting a few weeks for delivery, as long as the keyboard is a standard QWERTY layout (US, UK, Spanish, or German QWERTZ layouts are completely fine, I can deal with it or use stickers). Size & Weight: I am not looking for a thin ultrabook. The laptop can be heavy, thick, and have a huge power brick. Performance and cooling matter, not thinness. Condition: I am highly open to used or certified refurbished products, provided that the hardware functions 100% perfectly and there is absolutely no damage or scratches on the screen. Main Usage: I need a solid machine with a great performance reserve to smoothly run multiple programs simultaneously, heavy computations, and coding, lasting for years without becoming obsolete. Since I am new to this world, besides specific laptop models, I want to ask you: What exact websites, subreddits, forums, or hidden B2B/wholesale channels do you experts use to track down these crazy price drops or industrial clearance stocks around the world? Please give me the exact store names or direct links. Thank you so much to anyone who can help me find the ultimate deal!