My two penneth for what its worth.
Buy second hand because it’ll depreciate faster than you can calculate by how much and sooner or later you’ll either drop it or get knocked off it. It happens to the most careful of us especially if you’re commuting during peak hours.
Buy something that’s comfortable to ride (upright riding position) and reliable (low revving engine) over what it looks like because you want it to get up and go when your ready not when it feels like it.
Buy from a dealer because you’re less likely to end up with something less than desirable. It doesn’t have to be a main dealer, all dealers are bound by Law to offer motor vehicles of a certain standard, roadworthy and fit for purpose. Top tip here ask the dealer if this motorcycle is suitable for commuting 10,000 miles per year!
Buy a Euro 3 compliant motorcycle because of ULEZ 2021 is just around the corner and you’d expect any ride to last for more than a couple of years.
Don’t buy a commuter to save time or money over public transport because if you take all things into consideration public transport wins every time.