I have an older 2-person Marmot Sanctum 3/4 season tent which was discontinued about 15 years ago, matches your requirements, I like it so much that as it finally began to fall apart (UV exposure is killing the fly, I've destroyed the floor due to abuse) I went looking for a backup.
I set up a search on eBay where they do pop up from time to time, lost out on an auction listing a few years ago for a never used one (sad that I didn't bid a bit more), in Spring 2022 another lightly used one showed up which I was able to win at US$225). It was definitely barely used but I was slightly disappointed that it was an earlier version that had some slight differences in the interior pockets (not quite as nice).
If Marmot still made this model I'm sure it would be in the US$600 - US$700 range or more but Marmot like most makers have gone to lower weight (more mesh), thinner fabrics, less beefy zippers etc.
So I suggest you try to find an 15 - 20 year old no longer made tent and search for them online (eBay might be the best).
You can find old online reviews that all rave about this Sanctum model.
I'm still using my old one and bring along tape to patch up the fly as little tears appear due to the UV damage, I'm still keeping the replacement in reserve because I want it to be the last 2 person tent I ever buy.
On many of my trips I use larger tents/shelters, floorless and with floors as my main tent but I still bring the Marmot as well to use when space is an issue or shelter from strong wind is not available.
There doesn't seem to be a Sanctum currently available on eBay but a New With Tags one sold just a couple of weeks ago for US$228
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