latest macbook that has upgradeable ram is macbook pro mid 2012 (which is what i currently have).
IMO, currently, sure you have 16gb of ram. but your CPU is the bottle neck, what’s the use of having more than 8 - 12 gb of ram.
however, having something used is likely going to have meh battery life too.
if you don’t want a refurbished macbook air (m model) why not go for an ipad and with apple keyboard. surely as a student you’d likely need it mostly for documents, web browser, etc.
lol is that Philippine pesos?
35k (~630usd) for a core i3 8gb ram…not worth it
my current 2 cents