You mean liquidate right? There are a lot of options, but I agree with users here: Localbitcoins and Bisq are to me the best in terms of lots of choices and if you are patient, you may find good rates. Just be aware of scams and untrusted users. Fee wise, these are the best (they do not look good at first glance but minus the rates from other services, you discover they can be cheaper.
For us here, we also use Luno quite well, and I know in Europe you can use Austrian exchanger BPanda with no verification (but small limits). My suggestion is to find trusted traders on localbitcoins, keep in contact, later you will know which also buys other cryptos.
YEah, liquidate, my bad!
And, yeah, those two do seem like the best until TenX allow Ethereum anyway! I have their card just do not like using BTC for anything really if I am honest as the fees and wait times are ridiculous.
To the guys mentioning SEPA, am I missing something when I say SEPA transaction fees are £9 in the UK? Again, I do not wish to pay that sort of fee, I know it is not really much at all Im just a man of principle paying extortionate fees is something I am 100% against.