Decided to pull the trigger last night and just go for it since I would be getting it regardless. Besides, I can always ask after the fact about the specs if I'm so concerned, but since they provided pictures, and looking at their other listings, they would tend to specify if the device would have any problems, so I'm not overly concerned.
At worst, I've paid for 3-year used, crud battery-life laptop, with likely aging components, and would last me at most 2 more years.
At best, I have bought a <2 year used, alright laptop on the cheap.
If there were any problems, I have PayPal Buyers' Protection likely on my side anyway, so I concluded it was worth the gamble.
Thanks for all your advice!