A 130 with ags on the rear and tri-ribs on the front is NOT a "show quality restoration" because Case never supplied them that way. To me, that would be my first tip-off that the Seller wasn't serious about doing a true restoration and I would be scrutinizing every aspect of his work.
Without a full set of photos, there is no way for anyone to assess whether this tractor is complete or true to original. What documentation does he provide with respect to the work on the engine? Have you checked the tag numbers on the engine to see if it is correct for 1965?
I would value at TRUE show quality 130 at $2000.00 but the second the restoration work deviates from original, the value falls dramatically. Non-restored 130's that are complete, straight, original and with an engine that will rotate easily by hand can be found. They can be had for two or three hundred.
If you have to strip this tractor down to the bare frame again in order to fix all the mistakes made during the previous restoration attempt, then you may as well start with an untouched tractor in that price range instead of rewarding some guy for his poor workmanship.
If you have photos or wish more information..... then send me an e-mail.