It was more than 3 years ago and I paid for the surgery with my parents' money, so honestly I do not remember the price well. I had incisions on both sides. (This was when the previous doctor before the current one performed the surgery.)
Because it was under local anesthesia, while they were operating they noticed that the strength of opening my eyes was not symmetrical, and they gave me eye correction on only one side for free(?). That is what I remember. (But once the swelling went down, the eyes became a little uneven, which is a bit disappointing...) After the surgery, for 1 to 2 years people also said my eyes looked pretty, which was nice.
Now, about 3 years later, the side that did not get the eye correction has loosened a bit. (My eyes also tend to loosen easily even when I had buried sutures done elsewhere before, so I think it lasted a long time for a good price.)
Later I found out that two or three of my college classmates with pretty eyes had double eyelid surgery here too, so I hope that helps everyone..!