hello, iam new here! from beirut-lebanon! iam interested in collecting sydney mint type 2 sovereigns. now iam interested in having a nice collection but at the same time i want to buy coins that have the probability to increase in price in the future. now iam confused between: -UNC 1864 -choice UNC 1866 -choice UNC 1868 -choice UNC 1870 which ones of these you people recomend me to buy 1st? taking into consideration i would like it to be rare coin. thanks alot!