Lefties get a rough deal with a limited market. You find it hard to come by and even harder to sell on. My advise would be to buy either ambi or an alutec Walther or Steyr in right hand. Get a left hand pistol grip and reverse the cheek piece to make it left handed.
Then when you want to sell it on you can return it to r/h and stand a better chance of recovering your money.
Time served buyer and seller of left hand gear