I watch Western MA Craigslist for ebikes and that Stromer's been listed for a couple months now (ad's been "renewed" several times), so you might be able to get the seller to go down, especially this time of year.
If you do buy used and care about warranty coverage (which the ad boasts), be sure to read Stromer's provisions. A lot of mfrs won't extend warranties beyond "original" owners (Haibike for one) - I didn't see that in my brief read of Stromer's, but I did see that they require "presentation of the original receipt of purchase from a STROMER dealer. "