sub $100 for a "complete" fret job seems way cheap. quality work costs. those poor folks must be living on pork skins at that labor rate.
assuming i want to repair instruments instead of build them -and i'm not, and provided that your neck is one of quality, i would be in the $300+ range. the neck geometry, fretboard and truss rod would be assessed and if acceptable, every fret would function, every fret would be bedded, leveled, crowned, end radiused, mirror polished, and turn key. fret replacement if needed would be included -bound or unbound neck. we will talk about pleking if you are interested. before and after measurements would be taken and documented as well as re-humidification if required to stabilze the wood and access fret end condition depending upon it's storage environment. i would also assess the nut and correct issues as needed (including ramping and polishing and gauging the slots for your string set as well as top leveling) or quote a new one if necessary. if there are business card slices or other bric-a-brac under the nut this would be discussed. your tuners would be assessed and regulated as needed or quoted for replacement if necessary. if your trussrod, fretboard and neck shaft have problems that are correctable, that work would be extra. your neck and fret plane would be likely as perfect as any precision device made from organic wood could be barring any hidden structural issues that may cause dissatisfaction long term or any damage incurred from improper storage or handling of the neck and/or instrument post service.
now granted the above in more in-line with a restoration, it's possible that people are getting a basic "dressing" confused with more extensive work. some techs consider a fret rocker spot leveling "fret-job" so who knows.
