Zillow and redfin let you pick comps and do a pretty good job.
We are already down 10-15% from peak prices around March 2022, but still up 15% or so over last year.
If both sides agree on the comps to use, I think the zillow and redfin average is faster and about as accurate as an appraisal. Worth a shot trying, could save effort and $700 in costs.