I can't seem to find a shop that sells the Humax 9200TB and ships it to Belgium.
Anybody knowns one?

Can you use a 9200T in Belgium, does Belgium recieve UK Freeview signals?

Isn't' freeview just a brand name for FTA DVB-T?

Maybe, but there are certainly different flavours of DVB-T used in different countries. You would have to check what they use in Belgium, and whether a British Humax would receive it, and whether it would drive a Belgian TV properly (if that is what you will be doing).

That's just the awesome part of standards, they are every ware the same.
DVB-T and scart should be the same in our countries.
In the forum I found some people in the south of the UK who receive Belgian and Dutch signals.

Normally I will only have to buy an adapter for the power cable.

"The greatest thing about standards is there are so many of them."

If i was you and you really want one first buy a cheap UK DTT receiver then test that then if that is ok go for it.

I'd be very surprised if it is possible to receive a Freeview signal in Belgium, possibly on the western end of the coast but I'd doubt anywhere else.

If the OP wants to use the 9200T to recieve Belgium TV then if it is able to recieve those TV channels then I can only see one problem.
The problem being that the some of the 9200T features may not work ie Series Link, Auto Traking, but does depend on whether or not Belgium TV use the same meta data as in the UK.