Quick question about finding reliable codes for electronics/gaming gear

I’m currently looking to upgrade a few parts of my home office setup, but the prices for decent tech are still pretty sky-high. Whenever I find a "deal" on the major sites, the code usually ends up being expired or only applicable to items I don't actually want. It's incredibly frustrating to get to the checkout page only to realize the "20% off" was a total ghost.

I’ve had a bit of luck lately by checking PromoPro UK specifically for UK-based retailers, which seems to have a higher hit rate than the massive international extensions that just spam your browser. It helped me shave about £30 off a monitor recently, which was a nice win. However, I’m still on the hunt for more niche sources for PC components or gaming peripherals. Do you guys have any specific forums or lesser-known aggregators that you swear by for tech? I’m trying to be a bit more disciplined with my spending this month and would appreciate any tips on avoiding "fake" discount sites.