Oh my bad. I understood from your reply that the rates are dependent on who's selling so there is no one place that's got the best rates, and that the fees is what I should be comparing. So I asked which place has the best (lowest) fees. Or are the fees also going to flactuate?
Fees are mostly fixed(though they could change it whenever they see fit). And yea, there are simply so much exchanges to list, that you're best bet is to probably check out the fees of whatever exchanges you have in your country, and just pick the one with the lowest. Of course, take exchange reputation into account as well. I wouldn't pick an exchange that seems scammy even if it has super low fees.
Definitely take your time into doing research, especially if you're going to submit personal identification.