How much is this Felt Ar1 worth?

Hi all, I’m currently trying to upgrade my bike, he has it listed for $1800 CAD ($1250 USD). Here is the listing description:

Felt ar1 56cm
Ultegra group set 2×10
Crank 172.5 (52-36 teeth)
11-28 cassette
Reynolds 60mm depth (tubular 22mm)
100mm stem
38mm handlebars.

Barely used last season. Couple rides on the trainer this last winter.
I downsized to 52cm frame so I’m letting this one go.
Im 5’8 for reference.

Let me know if you have any questions.
Located Brampton.

My Comments:
I currently have a 60cm frame bike, it’s an endurance frame (2012 Trek Madone) it is rated for 6’ to 6’5” riders. I am 182.5cm (3/16” off of 6’). I thought the bike would fit fine so I bought it. After a few rides I realized that it was a bit uncomfortable, I thought I was my form or the seat position but no, I think it is the frame. Also the handlebars/drop bars are very wide apart.

I loved the looks of road/race bikes but my main concern was the frame size. I’m looking for a 56cm frame or maybe a 58cm at most, with narrower handle bars. I just want to know if this is a bike worth getting and what should be a fair price for both me and the seller.

Please note that where I’m from (GTA, Ontario, Canada) the used bike market is pretty bad, price wise, so please do not say “That bike is worth $800 max” because here you will not find a carbon bike under $1000. And that’s in mid to low tier condition. This one has carbon wheels, good groupset, and is pretty well maintained.

This bike has full mechanical group set with rim brakes. I think they will be easy and cheap to replace and diy. But I really need some help deciding.

Any feedback is appreciated. Thank you in advance and have an awesome day. 😄