Don't hope for mint, hope for a full all-out restoration. At that level, have them prove it.
There are only a few parts that are totally unobtanium, most of the rest can be worked around. (power output transistors, pa1002a's)
Quite frankly that price level's an EchoWars / Punker X (tuner work) 1980 or a markthefixer 1980 (I do full tuner resto's and alignments, EW sends it to Mike..., )
Also with many many little extras done that are quite time consuming - like removing all the switches for either mechanical or ultrasonic cleaning, NOT just deoxiting.... Getting the tuning cap cleaned up to be totally mechanically noiseless, and minimally microphonic (I ain't tellin how I do it or test for it... but it's part of my rave tuner reviews.) More than 200 parts are replaced....
NON-WORKING sx-1980 fixer uppers have been going around 1000.00 for quite a while.
working units are about 1600 - 1800 if they haven't been serviced
then serviced is 2500+, no BS. with well restored units going OVER 3200, recently...