Hello! I've been on Yasmin for like 5+ years. Nowadays I head to JB / Bangkok to buy the pills from REPUTABLE pharmacies (e.g. Guardian in JB). In JB there's no need for a prescription, but PLEASE consult a doctor before you start - this kind of money MUST SPEND. Apparently, doctors tend not to recommend Yasmin for smokers due to higher likelihood of DVT.
Bought my own Yasmin from JB and Bangkok at less than 1/2 price of what I get in Singapore (I got them at around $15 SGD each). And I don't think we should be "selling" our excess cause these are pills / medication and should be bought from a licensed pharmacist.