OP requested keeping "on topic" to just car pricing. Not sure how that can be achieved, as it's all about the virus.
Economies may start moving again after 2 or 3 months of virtually no activity but the problem then is the very real prospect of a further surge in cases.
The billion dollar question is how many people have already had the virus? Around 100,000 recorded cases in UK to date. Assuming that's only 20% of actual cases, let's say 500,000 people have had it. That still leaves 60million people susceptible. It's very contagious. It carries on spreading until most people are immune.
I really can't see that governments who have almost completely shut down their economies for weeks on end are just going to stand by while their ICU departments are overwhelmed again. They will lockdown again.
Even if a second wave doesn't come and there isn't further lockdown, there remains significant threat of this. And that's hardly going to build consumer confidence.
The problem isn't going away until the whole world is vaccinated- experts say 18 months minimum to achieve this.
Dealers may not be desperate to sell stock now, but they soon will be. I don't know what sort of discount can be achieved, but if I was offered 5% off a used car, I wouldn't be interested.