Euro Symbol, Charset 850 And Unicode

Dear experts,

I'm having a problem with the Euro symbol on my SQLServers which all have characterset 850 and Unicode collation 1033. As far as I can see charset 850 does not contain the € symbol, but if I run a query

DECLARE @nstring nchar(12)
SET @nstring = N'€'
SELECT UNICODE(@nstring), NCHAR(UNICODE(@nstring))

Result: 8364 €

So the Unicode character 8364 is the Euro symbol. My question now is how do I have to write a statement so that the € symbol is shown in the output.
I need to use something like the following:
Select 'Costs:'+ € + convert(money, table1.costs)
Result: € 123.00


I tried several options but never get the right output. Is there any way of doing it or do I have to change the characterset.

Markus