I can easily find a used MBA M1, base model (8/256) on FB marketplace (I'm from the Bay Area) for $700. That's $200 off the target..But if that's beyond the budget, I still think the Macbook 2015, 15' with the upgraded (Radeon R9 370x) is the best Macbook out there for that price range. Probably the last great Macbook Pro since a few years ago that was released. Maybe others here who know more about Macs can chime in and recommend something different. I have the non-upgraded GPU MBP 2015, 15" and bought it to use for college and to replace the 13' MBP, Intel from 2013 (I hated the 13' MBP). It was well worth the upgrade. Very nice to type and work on.
I kept using it for work after graduating until Last month when I got the MBP 14" from Costco (1,599 deal). I like the M2 MBA Better but ...yeah, that's another topic for another day..
The MBP 15' is great. It's easy to type on, has a bright enough and big enough screen. Has some useful ports and can be upgraded to Monterey. Battery life, bulk, thermals, and fan noise are probably some cons but it is to be expected. It's 7 years old.
I didn't think much of it or think it was a great laptop...I didn't care about specs. It just did the job. Was easy to type on and to play games on. So I kept it and will keep it until I give it away. Looking at some reviews..it was considered one of the Best macbooks that Apple ever made. Who knew? Not me.
check out this thread:
You can find it on Ebay. Maybe FB.