Hosts already set prices, in addition I have seen the Sia community occasionally discuss adding some further pricing tools on the reddit, see what features are being added on the roadmap: https://trello.com/b/Io1dDyuI/sia-public-roadmap

I personally have not had issues moving siacoins, but a few exchanges have been slow to patch issues on their end in the last month: https://www.reddit.com/r/siacoin/comments/7pc5rv/brief_offic...