Where's the logic?

I felt I was in need of some new denims and went to Ewha University station in Seoul.  The area has tons of cheap trendy clothes.  I've been there a few times, and actually got my lovely Christmas sweater from there.  Overall, I've been pretty content with everything I've bought in the area.  

After a little wandering around the other day, I stumbled on a new store that had some nice looking jeans for about $20.  I decided to look around the area a bit more before buying anything, and in the end I came back to the jean store.  After about 20 minutes or so of looking through their selection, I finally find a pair that I like.  So, I ask to try them on.  Not allowed.  This doesn't shock me though, because a lot of places in Korea don't let you try their clothes on.  To be more accurate, they don't let foreigner's try their clothes on.  I've asked in many places before, only to get turned down, and then see a Korean come out of the change room with some clothes that he'd just tried on.  

I really like the pants, but now I'm unsure if it's such a good idea to buy them without knowing whether or not they fit.  For only $20 though, I figure I should buy them, and if they don't fit, I can just give them to someone else and they won't be a total waste.  I decide to make the purchase.  After paying, the cashier hands me a receipt and tells me that I can bring them back within a month and exchange them if I need to.  Wouldn't it make more sense to let your customers try on the pants before they bought them? To me it certainly would, to them I guess not.  

I get home, try the pants on, and well, they're pretty snug.  The material also feels super cheap, but I could have expected that.  Now, I have to make the one hour train and subway trek back there just to exchange the damn things.  A trip I could have saved myself from making if they would have allowed me to take 5 minutes to try them on, find out they didn't fit, and get the next size up.  My time is counting down in Korea, and I can't afford to make all sorts of needless trips.

I have one fear about this whole thing though.  Countless stores open and clothes (HAHAHAH, pun wasn't intended, but I seen it after editing and had to leave it) within a month or two all over the place.  Could this be one of those stores? If so, and following with my great luck in 09, they'll be all closed up and I'll end up with a pair of really tight pants that I may only be able to fit nicely into by hoping into my Delorean and traveling back to about 2000.