The V60 will have an 8speed automatic programmed to save gas. A lot of shifting but at least the turbo-4cyl has plenty of torque to keep things moving swiftly.

The lag you felt might have been the optional auto start/stop feature (where the engine turns off while car is momentarily stopped, then quickly restarts when you press on the accelerator)? I gather that most people turn that feature off (via the button on the dash) because the lag is annoying. Otherwise you might check to see if a "Sport" mode for the trans is available. That will make the throttle respond much quicker.

I don't really know what they should cost but to me that price doesn't sound outlandish for an AWD model. I test drove a FWD 2017 with 58K on the clock. Dealer was asking $18k for it. IMO it's worthwhile to contact Volvo, even your local dealer, to find out whatever you can about the car, especially the status of the warranty.

You might check on exactly what flavor of engine it has. The least powerful T5 will run on regular gas but the T6 high pressure turbo requires 91 octane. In my neck of the woods that's a difference of $6-7 per tank.

Best regards,
Will