For Deeve:
Trussrod - does it even have one? Doubtful. That's ok, if built properly it is not needed.
Most classical string sets put less tension on the neck than steel -- say, 160lbs vs. 90lbs. How the neck is attached and if the angle is 'correct' is really the bigger question.
Fretboard radius - any? Dead Flat -- that's how classical guitars roll.
Nut width - how much fatter than my 12 string? 2" or very close to 2" is considered 'standard'
Bridge/saddle const - Bridge is probably rosewood (very standard, but not requirement), bone for saddle gives best tone (if it isn't already, consider an upgrade later). A properly shaped/slotted/filed nut of bone is also a big plus.
Slotted headstock/tuners - new territory for me: They're just tuners - tying / attaching strings may be the biggest difference for you.
Pre-amp/pup - obviously diff: go with what you want; I don't have those on my guitars.
Cutaway : go with what you want; mine are all standard body style/shape
other - what to avoid, regardless of the "great deal" being offered?
Like DuckDodgers said, there are a lot of crappy cheap classical type guitars 'out there'. Even big name brands can produce some fairly inferior/sub-standard guitars. It's always best to aim for top notch materials, construction, workmanship.
Sorry, I'm long-winded. I've played classical since 1982. My main guitar is an Alvarez-(K. Yairi) CY140 -- top of the line brand new in 1981 (a $1000 unit in 1982!!!). I keep it stashed away most times (it starting to get a bit tired in some ways). Anyway, it's handmade Japanese copy of the Ramirez 1a -- solid cedar top, solid rosewood ('Jacaranda') back/sides, bone nut/saddle, ebony fingerboard, French Polish and sounds and plays fantabuous. There is nothing so sublime as a really good acoustic (classical) guitar. Very Spanish design and sound.
Recently, I've picked up a couple of inexpensive European imports (made in Romania) - to add a little diversity and spread the playing time around: These are great, lots of guitar 'for the money':
https://www.thomannmusic.com/pro_natura_gold_serie.htm $188 (+about $60 shipping), Solid spruce top, solid maple back/sides, traditional Torres bracing, etc
a bit different due to wood substitution for fingerboard/bridge, and a different 'look' (no dark tropical wood) but plays and sounds great (after some basic post-factory prep).
A review last year of the Thomann-brand counterpart to the GEWA unit above (same guitar, same builder, different appearance, but otherwise identical):
https://www.tdpri.com/threads/ngd-thomann-classic-s-4-4.962925/