Looking at purchasing an M35X with a busted front driveshaft. The dealer wants $600 for the part alone, but I'm trying to see if anyone has any recommendations for an aftermarket driveshaft? I've checked eBay and Amazon and most are priced at less than $100 but not sure of the quality. Any recommendations appreciated. Thanks in advance.

I wouldn't trust a $100 driveshaft to be honest, and the only models I know anyone has used are the official OEM steel one and the carbon fiber Driveshaft Shop one.