Go straight in but will need a 10 to 12 pin adapter. Can get them for around £40 on ebay.
Depending on condition, a good second hand set will be around 300-400. Anything higher than should be in a highly maintained state. In that price range make sure its got bulbs, ballasts and ignitors. And also look out for broken tabs. They can break easily.
Sent from my SM-G955F using Tapatalk