£1,400    2002 renault trafic

Its a 2002 renault trafic I bought it about 1 month ago as a good runner but the therostat housing has gone so when ever you put water in it just leaks so no water get to the egine so it overheats had a merchanic out to have.a look he said that I need a new housing and dome wiring done all will cost abou £300 to put rught I bought it for £2000 selling for £1400 ono