It would only benefit the seller if they specifically said numbers matching engine and? trans stampings?
Buyers are cautious of generalized statements like "numbers matching" to some that is as little at vin to specific model....to others its stampings on motor/trans/both body stamps, buildsheet, fender tag. And so some "full complete docs" would include window sticker to those aforementioned things. It's not the seller of this car, it's all the others that try to slip murky info by potential buyers.
Most potential buyers of this car will be pretty well versed with numbers, docs, body features, etc. Granted they can see them.
It would really be a lot easier to spot that info with some paragraphs in the description. I totally missed that numbers motor and buildsheet info in the middle of that unbroken text. I looked at every picture though.
Pictures of the motor #'s, trans #'s, and buildsheet would solidify things too.
Being numbers motor and buildsheet, this could go past $40K. Would not suprise me if the seller is expecting at least that much.