I am getting close to finishing my collection (about 75 more UCD cars to go, and 100 premiums or so, but I have all the expensive ones, i.e. 10 million and above). I traded for the 370Z GT Academy Version '08. That's the only car, since it is so rare and I did not feel like winning a level 12 ticket and opening it 6000 times to get the thing (nor birthday trick).
Realistically, I could have gotten enough level 12 tickets, without duping them, or reloading to open, to get the car, but that would have taken more time than is necessary (and is borderline insane).
No duping involved, not even for paints.
Really, do tell how you could get more than two Lvl 12 tickets in the game without trading to acquire more than the two one wins?
The 370Z GT Academy is an easy car to acquire from the Lvl 12 ticket because there are only 27 cars that come from that ticket.
Level 12:
Audi R8 5.2 FSI quattro '09
Chevrolet Corvette Z06 (C6) '06
Citroën Citroën C4 WRC '08
Citroën GT by Citroën Road Car
Cizeta V16T 94
Dodge Viper SRT10 Coupe '06
Ferrari 599 '06
Ferrari F430 '06
Ferrari SP1 '08
Ford Focus RS WRC 07 '08
Jay Leno Tank Car 03
Lamborghini Gallardo LP 560-4 '08
Lexus LFA '10
Mines LANCER EVOLUTION VI 00
Mitsubishi CZ-3 Tarmac Rally Car
Mitsubishi Lancer Evolution Super Rally Car 03
NISMO Fairlady Z Z-tune (Z33) 03
NISMO Skyline GT-R R-tune (R34) 99
Nissan 370Z Tuned Car (GT Academy Version) 08
Nissan C-WEST RAZO SILVIA (JGTC) 01
Nissan GT-R Black Mask '07
Nissan GT-R SpecV '09
RUF CTR2 96
Shelby Cobra 427 '66
Suzuki SX4 WRC '08
Toyota Atenza Touring Car
Toyota SUPERAUTOBACS APEX MR-S (JGTC) 00