True, i checked this out. If based on information from OP:
https://www.coinexchange.io/market/VSX/BTC - wallet on maintenance.
https://c-cex.com/?p=vsx-btc - VSX was delisted about two weeks ago.
https://novaexchange.com/market/BTC_VSX/ - registration for new users is closed? Can't find link to registration.
https://tradesatoshi.com/Exchange/?market=VSX_BTC - wallet on maintenance.

By the way, how many coins you want to buy? May be someone want to sell it.