Quite alot, Mostly Standard - Which seem special as you have to mess about to get them, Premiums are just there, in the shop - ready to buy any time. 1600-1700 standards ... 200 Premiums...
But some of those Standards you have to really look out for. Vertigo Gillet springs to mind as a car I waited - 18 months or so to get, As I missed the days it was in the Used lot.
Of those standards 75% I guess have been bought, but never used, too many cars. Many are certain cars that you have to have a few of. (TVR's, Jags, Lambo's Stratos... Gillet Vertigo's (Everyone has 4 of these right? It's not just me?)
Locking cars... you could Gift them to some one, who will have it as a perfect 0/0/0 time capsule ticket. But I don't know how many tickets you can have... and it would be hard to pick out a certain car if you need to cash it in to use the car. (No filters you see).