I bought a Rockwell safety razor for 50 euros after using a cheap 20 euro version for a while. The Rockwell is much better. Heavier, better grip and a reversible base plate for different settings. 50 euros should do and still is much cheaper than my cartridges.

PS: wit good prep I have no rasor burn. A cheap brush, warm water and cheap shaving soap. The soap lasts me nearly half a year.