It seems to greatly depend on the country and your insurance and whether you’re doing a scrip or diy.

https://teddit.net/r/asktransgender/comments/3h6i66/hrt_costs_in_other_countries/

https://en.m.wikipedia.org/wiki/List_of_countries_with_universal_health_care

Some countries with decent trans healthcare laws (Cuba/Argentina/Pakistan) subsidise it to make it completely free or low cost. While places like the US will make it cheaper IF you find a job with good insurance. You won’t find the same price even in two different cities or two different months due to the way insurance and store pricing fluctuate constantly. Without insurance it can be $150+ for a 90 day supply or $60+ for a 30 day supply. With insurance this goes down to $10-25 in both cases.