Hi! Can anyone tell me where to buy UB101 size 28 indigo online for cheap? something like sub-$50 if possible and it's okay if it's a bit used. And is it a good idea for me to size down? my waist size is 29, 130 lb at 5'8'' so yep I'm thin. It's going to be my first pair of raws, if ever, that's why I have a lot of questions. Thanks!