I get that, but when you are doing things on a budget long term view is almost as important the cost. If you spend £180 on a 5700X3D that is a waste of money. Pars listed below but with 32GB OF fast RAM, 16GB will be £30-40 less.
Data from a website that cannot be linked.
CPU: AMD Ryzen 5 7500F 3.7 GHz 6-Core Processor
Motherboard: MSI PRO A620M-E Micro ATX AM5 Motherboard
Memory: Patriot Viper Venom 32 GB (2 x 16 GB) DDR5-6200 CL32 Memory
Video Card: Sapphire PULSE Radeon RX 9060 XT 16 GB Video Card
~Total: £573
Stick the bundle on FB/Gumtree and don't just sell it to the first people that come along, also price it higher and than you want then offer a lower price, people are generally happy if they think they got a deal. Or if you put in on MM here if you have access, you'd easily get £180 for those parts, even more so if yo have boxes and accessories for them.
Total spend would be £400 if you got £180 for your bits, and that includes a heatsink for £10 if you want it, and another £10 if you fancy a nice Thermalright tower jobbie.