Mint LCI halogen headlights will set you back £300. Ones with broken or repaired lugs will be around £250. I got a pair from a breakers with one broken tab for £240 and then fixed it.
Don't forget, you need the front bumper and grilles to go with the bonnet. Actually don't need to swap it to fit fronts, only rears.
57 Sapphire Black E91 330d M-Sport
Privacy Glass // Leather // Heated Seats // Bluetooth // Blacklines // BMWP Gloss Black Grille // Alpine HiFi // LCI Headlights