1 9 7 0 s ▁also ▁saw ▁un stable ▁supplies ▁and ▁many ▁ret ail ers ▁stopped ▁carrying ▁R IO s ▁when ▁models ▁were ▁only ▁delivered ▁a ▁few ▁vehicles ▁at ▁a ▁time ▁( S inc la ir ▁ 1 9 7 9 , ▁p .   3 8 8 ; ▁S inc la ir ' s ▁ 1 9 7 8 ). ▁In ▁ 1 9 7 7 , ▁David ▁S inc la ir , ▁the ▁main ▁R IO ▁im porter ▁to ▁the ▁United ▁States , ▁wrote ▁that ▁there ▁were ▁collect ors ▁who ▁had ▁been ▁waiting ▁on ▁certain ▁R IO ▁models ▁since ▁ 1 9 6 4 ▁and ▁that ▁he ▁could ▁have ▁used ▁ 1 , 0 0 0 ▁examples ▁of ▁each ▁instead ▁of ▁the ▁trick le ▁he ▁received ▁( S inc la ir ' s ▁ 1 9 7 7 ; ▁Lev ine ▁ 2 0 0 9 ). ▁ ▁F ocus ▁on ▁classic ▁vehicles ▁A ▁per us al ▁of ▁the ▁online ▁store ▁' Car model ' ▁shows ▁that ▁R IO ▁makes ▁at ▁least ▁ 2 5 ▁different ▁models ▁today . ▁They ▁seem ▁more ▁solid ▁and ▁the ▁company ▁more ▁aligned ▁to ▁the ▁main stream ▁model ▁car ▁business . ▁ ▁Pack aging ▁is ▁more ▁in ▁line ▁with ▁other ▁collect or ▁/ ▁to y ▁car ▁manufact ur ers . ▁ ▁Perhaps ▁this ▁is ▁now ▁R IO ' s ▁main ▁business ▁– ▁its ▁other ▁tool ▁and ▁die ▁purs uits ▁perhaps ▁pushed ▁aside . ▁ ▁One ▁reason ▁R IO ▁modern ized ▁was ▁due ▁to ▁competition ▁with ▁newer