Hi and welcome to the forum. Found your thread...
Here's what I posted on PM, in case there are others interested, or additional comments.
"What is your dealer doing with a 2018 model? Has it been a demo? Or a used bike? How long have they had it?
The reason I ask is because the battery pack is the most expensive component and they don't do well just sitting around in storage. Worst if they've been left in a discharged state for any length of time. Or is it a brand new bike in the crate? It makes a difference. If it's the latter, probly a good deal, but I would be wanting to get it for about $1500 to $1800 all in. It is now a two year old model.
We got a 2019 model - our dealer ordered it in February, just before the pandemic lockdown - they still had a few at the distribution center of GIANT. It's been perfect. I think we paid about $1900 for it, plus sales tax. I can't remember if it's a M or L. Looks like they are all now sold out.
As far as differences, not much. I think the 2018 has the lcd display, but otherwise they're virtually identical.
It is an excellent bike, I think one of the best. Especially for the price point. The Yamaha assist system is outstanding, very reliable, and trouble-free. They have very good range with the 400w pack, and are easy to ride. The 700c wheels make for very smooth and stable riding. Wife absolutely loves hers. "