I purchased a used 2007 V6 in 2016 and honestly, besides my Challenger RT, hands down the best, car I’ve had (I had an 03
Grand Am too and that was equally as good) Naturally I had to make repairs to it, such as a trans rebuild, heater core replacement and now a potential head gasket, many of the repairs were required after I was hit in the passenger front. I don’t know much about convertibles, but I think if you can get some to look the car over, make sure there are no serious leaks or potential leaks it is a good buy. I purchased a 2009 Malibu LTZ and I feel I’ve got more issues with this one than my 07 G6
Best of luck!