Hi and welcome.
I have moved your post to the Freesat section of the forum, where it sits better.
Yes, Freesat boxes will be cheaper to buy in the Uk, so it may help if you are in the UK to buy on in the UK. I like the Manhattens and Grundigs.
I can supply and install a 1mx90cm dish, with a high performing LNB and cabling for 150 euros.
But note that although BBC and ITV are currently available on this sized dish, with the launch of a new satellite towards the end of the year, it may well be that by mid November or December, BBC and ITV channels may no longer be avauilable on this size dish. What size dish you will requrie is unknown until the new satellite is up and operational - even if some other "installers" are suggesting install 1.8m 1.9m dishes and you will be OK. No one knows for sure and a 1,.8m 1.9m dish may still not be big enough.
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