Might depend on what someone would call low mileage. I consider the 38k I have right now on mine low mileage but that amount is high mileage to most.You can buy a 15-20 year old Harley with low miles for a fraction of it's original cost? Where??
I really agree with this. I'm not a big (or strong) guy 5'10" around 160# and started out on a 750 Shadow. At over 500# it's way to heavy for my skill level.One of the problems with beginners buying big bikes is that much of the riding experience (especially low speed riding) will not be as enjoyable as it would be on a lighter, smaller bike.
You may start to dread riding (or at least not enjoy it as much as you should) and that will result in you not riding that much. Then the bike will just sit, and you will find other things to do with your free time. The bike sitting will become unreliable and ANOTHER bike becomes a garage queen for years and years, eventually to be sold off for a fraction of the original investment.
Lots of very low mileage 15-20 year old Harley's out there, because of exactly this.