For the money I do have I can't really find a CPU much better than mine in my country, however, I've seen one that really caught my eye (an i5 6400) for 145$ on AliExpress. The seller is labeled as a "Top Brand", exists for 4 years and has 99% positive feedback, which is a plus. However, I'm not really familiar with the technology of the processor itself, so can somebody more savvy than me help me and tell me based on the info presented, is it worth a try.
https://www.aliexpress.com/item/Intel-Core-i5-6400-Quad-core-2-7GHz-3-3GHz-Max-6MB-Cache-LGA1151-CPU-Processor/32785094148.html?spm=2114.search0104.3.1.174252daVUvsdO&ws_ab_test=searchweb0_0,searchweb201602_5_10065_10068_319_10059_10884_317_10887_10696_100031_321_322_10084_453_10083_454_10103_10618_10307_537_536,searchweb201603_51,ppcSwitch_0&algo_expid=a1c42f2a-9b78-43ae-845e-4ac9c45787b4-0&algo_pvid=a1c42f2a-9b78-43ae-845e-4ac9c45787b4
https://www.aliexpress.com/item/Intel-Core-i5-6400-Quad-core-2-7GHz-3-3GHz-Max-6MB-Cache-LGA1151-CPU-Processor/32785094148.html?spm=2114.search0104.3.1.174252daVUvsdO&ws_ab_test=searchweb0_0,searchweb201602_5_10065_10068_319_10059_10884_317_10887_10696_100031_321_322_10084_453_10083_454_10103_10618_10307_537_536,searchweb201603_51,ppcSwitch_0&algo_expid=a1c42f2a-9b78-43ae-845e-4ac9c45787b4-0&algo_pvid=a1c42f2a-9b78-43ae-845e-4ac9c45787b4