A pound in 1975 is equivalent to €13 today in terms of average earnings.
So the Sindy or Lima Set would be c.€160 and the Matchbox (be still my beating heart!) would be close to €6
This also explains why you didn't get the Raleigh Chopper off Santa, as at £65, you'd get a motorbike for the equivalent cost!
I remember getting my Hornby Irish Freight in Dunnes stores in 1980 for Irl£20, equiv to c.€120 today
So really, no major change in terms of prices.