Everybody, now that Novaexchange has closed deposits, you can still sell your ESP on Livecoin for ETH:

https://www.livecoin.net/en/trade/index?currencyPair=ESP%2FETH

There is an active market here with quite some buy orders. 1 satoshi equals 23e-8 ETH at the moment. Livecoin is a great site, made by Russians.

(I haven't checked that Livecoin is on the right chain though ... please confirm if ESP deposits work!)