User blog comment:RainingPain17/New GTA Online update revealed/@comment-25368842-20150603102955/@comment-4210063-20150603224334

I already made a long wall of text regarding this "issue" over at GTAForums but I'm too lazy to write another one.

Just gonna reply to one (or two) comment. "R* show us great vehicles and we want them, so if they're in story mode we demo them and may not like the vehicles, by then we've bought them Online (say the Osiris sells for $700,000) if we decide we don't want it and sell it. By then LSC will not give you back the cash you paid, and we lose around $200,000 (plus extras we paid for mods). It's all a scam so we buy more cash cards (or they hope we will) and they got more cash. 1 billion plus from ONE GAME clearly isn't enough for them If we demo them in V we've had our fun, so they don't get their money!"

- Leon Davis

There is no scam. They are not forcing you to buy cash cards. Why they won't let you sell high-end vehicles anymore? Simple answer. The money glitching people who are too lazy to earn the money legitimately and instead have to dupe their chromed abomination to later sell it repeatedly over and over again. These are the people who should be blamed. Do you get random popups that say "Buy cash card"? Does your gameplay suddenly get locked behind "Buy cash cards" wall? The only time "would you like to buy some GTA$" appears is when you are trying to buy something while being flat broke, and this is just a suggession if you would like to buy one not an order that you should go buy one. Nobody is forcing you to buy them. You don't even have to acknowledge that they exist. My IRL friend bought a cash card because he didn't have time to grind for money and just wanted to customize his car. That was only his choice and definitely a better one than glitching.

The point is, cash cards are not a scam.

As for the vehicles you can test them in Capture or Deathmatch creator. You can even host a solo race and try out the car there. Can't customize it but driving a stock version should be enough to give a good idea how it handles.