The pictures show a set of stainless steel door interior sill . Two for each side , so one side is missing...
What I see is a set of belt line trim and inner door sills, one for each side. I believe you are referring to the outer door sills, which don’t appear to be part of this ad.
W&N new set of belt trim cost about $960.
I bought the front from the them. The quality is excellent. In fact I think it is BMW original.
As Scott mentioned the trim in this ad appears to be in very good condition. FWIW, there have been a number of complaints about BMW replacement belt line trim:
https://e9coupe.com/forum/threads/belt-line-trim.19919/
Dashes only does a set for about $1500. A new set of wood done by Bela is about $ ??? Don’t know but I think is 700 or so
If we are going to pick apart Daniel’s ad, let’s be fair. Your alternative seems like a good option for folks with good cores, which not everyone has. In the last 45 days or so I’ve seen a flood car listed and an e9 project with a dash that exploded in the sun. I also think you are overlooking the instrument cluster which seems to go anywhere from $300 to $900 used depending on the seller. Using your numbers and mine: $1,000 shipped for new belt line trim, $300 for replacement gauges, $100 to ship your dash to JD, $1600 shipped back from JD, $700 from Bela (excluding shipping) = $3,700 (with door wood). Add another ~$550 shipped for new inner sills from W&N (@ $280 ea) and. you are well over $4,000.
My take is that belt line prices are 100% subjective but regardless of the purchase price, having it polished puts you at new prices. If this trim above is show-ready then the price is on par with both new and restored trim. That leaves $2K for a clean dash which is FMV. My only issue with the dash above is that the gauge cowl is a bit lumpy where it meets the dash.
Anyone who needs a complete dash needs to factor in another $450 for under dash panels at ~ $150 ea, and another $150 - $300 for console sides.