I have had an ebay radiator before also. Sometimes they have trouble fitting, you may need to bend something or cut a hose.

Some people have had no problems with them. Mine started seeping from the welds a bit after a couple of years, but in no way was it going to kill my engine.

Just keep a good eye on it and inspect for leaks regularly. In any case, provided it fits, it will do the job until you can afford something better.