Need recommendations for a budget-friendly laptop

Hi! So I'm an eng'g student looking for a laptop na under 30k sana. I’m thinking of buying kahit second hand lappy sa FB Marketplace sana kasi feeling ko kapag brand new, and with my budget, limited lang yung specs ng mabibili ko. Although I'm still hesitant kasi baka ma-scam🤧I'm already in my last year naman din sa college so as much as possible ayokong mag-spend ng malaki and nagtitipid din ako hahaha.

I’ll mainly use it for Python programming to analyze large datasets and other statistical tools for my thesis. Not looking for gaming but I do need something that won’t struggle with heavy data processing or long coding sessions.

So I’d like some recos sana for laptops na pasok sa budget ko and goods na ang performance.

TIA!!