Geez. I really hope those reliability woes are just early model issues and they resolve them quickly. It's ironic (or odd) how it works in that the MORE you spend on a car, the more reliability issues are accepted, i.e if a Gran Turismo isn't a reliable car, that might not put off its affluent clientele so much as they want that car for the "sex appeal" and exotic rarity.
If you release a $65K (base) car, and it is a reliability disaster, well then, sorry to say it, but even with a Maserati badge, it's simply a piece of junk (and I am not calling the Ghibli that to any measure, at least not now). The MSRP is too accessible and it's in a segment too designed for mass market use to have all the quality quirks of the more expensive therefore more rare and exotic models.
SOME reliability issues are even acceptable, and with the Maserati badge and prestige can be looked over as people who get a Ghibli are looking for something more rare and less clinical than the rest of the segment offerings (therefore being "a little less reliable" might be passable). But it can't go too far at all off the deep end there.
I would love to know how much the dealer gave you, or at least what % of depreciation you took on the buyback. Might give us a good basis idea on what early used models may be getting purchased for.