Purchase advice

With warranty, yes

Id only buy the car untested if it come from Tesla. Is it from a garage or private?

I recently got a 2023 RWD with 19” sport wheels, 27,000 miles, $21,800 2 year warranty and 5 year battery warranty Check the pre-owned vehicles on Tesla.com

$19.5k is the aggregate average lower mean when given OPs stats. I used a Google crawler with specs OP listed.

The issue as I see it is this. If you buy it from somewhere else, you are going to be paying monthly for a car out of main warranty half way to the battery warranty being gone.  But I am finding lots of cars with maybe 10% more expensive but also with 1/3 the mileage.  Also consider you will almost assuredly need a set of tires and thee is the difference.  Shoot for less than 4 years old, less than 35000 miles.

Well let me ask you this. For a 2021 m3LR with 70,000 miles worth $12,000

I got a similar deal. The 2023 standard range has an LFP battery, which is a better option in my opinion because it's more stable being charged to 100%. I've had mine for 3 months and it's been solid.

Make sure you go into "Service Mode" and look for any stored faults that may signal an impending problem. I went through a few possible M3 purchases and ran away when I saw the stored faults. Not all of them spell a future problem, but some do. Google what you see.

Good price but I wouldn’t. I’d be a little more patient for a 2022 ryzen with possibly FSD

2024 and later is way better…

I bought a model 3 base no ER or AWD but every option for 27k cdn with 90k miles on it so why not. Other than the fact I bought it in January when it was -5c and it had LRR EV summer tires at 4/32 it was a great purchase. I did replace the tires with all weathers. Not that it stops it from going sideways sometimes elons traction control is good but not every time.

That's more than half the price of a brand new Model 3, so dear lord, no. If you can make the payments you'd be better off financing a new one - or finding a better price on one with fewer miles.