Trek Domane buying advice
Looking to upgrade my 12-year-old road bike and am looking for Trek Domane buying advice.
Getting older (48 in Sept), the typical ride is around 30-40 miles, looking for comfort while still deluding myself that I have still have speed. Rode a few and gravitated to the Trek Domane. Felt very comfortable to me without being squishy or just absorbing power. Was very impressed and decided to look at buying.
Found a used 2018 Domane SLR Disc Project One locally. Seems to be the stock bike (Di2, Aerolus 3 carbon wheels, etc. except with a custom paint job). However, I go to BicycleBlueBook.com and find the 2017 and 2019, but no 2018 listed. Did the Domane SLR Disc not get an upgrade in 2018?
The local 2018 SLR Disc in my size has an asking price of $5500. BicycleBlueBook lists the range of the 2017 as $3120-$3213 and the 2018 as $4238-4365. $5500 seems high unless I'm missing something.
My questions:
1) Did the Domane SLR only receive model updates in 2017 and 2019 (why I can't find a used value guide for the 2018)? Just use the 2017 values for a guideline?
2) $5500 seems high considering the above. Am I missing something? The bike had no added features -- i.e. power meter, upgraded wheels, etc.
3) If I'm set on Trek, is it worth buying used (and not getting Trek lifetime warranty) or should I pay the premium and buy new?
Many thanks in advance for your time and advice.