Craigslist,
diposting oleh Paradise Jedaite di forum Korea Selatan
Hey there, I'm not sure about Suwon, but on this link (http://seoul.craigslist.co.kr/search/hhh?areaAbb=seoul) you can check out many housing offers.
Also, here's the contact for a real estate agent, hey may help you find a place to stay in Suwon:
Sean Kim
Agent / James RealtyMobile : 010-9261-0713
Whatsapp : +82-10-9261-0713
Kakaotalk ID : soooooa
Line ID : seankim7770