Those definitely look like bootleg dvds. I wouldn't buy them. Real versions are usually $50 and over.
Try these sites.
dvdfromkorea.com (ships from korea) (real Korean release with english subs) Shipping time depends on shipping option. I ordered Sassy Girl, Chun-hyang from here. Order shipped within 24 hours. Should be receiving it by the end of this week.
scarecrow.com (located in seattle, wa) (type in Korean Drama for a list of dramas) (ordered coffee prince from here very fast shipping)
(reliable and fast shipping)