To be fair you need to drill down to what's actually being quoted. Clutch, flywheel, release bearing, spigot and bell house bearings and it'll add up. Add MD labour rates and there you are.
Spigot and bell house bearings are cheep, so a no-brainer to replace anyway. Clutch is a given, but the fly wheel and release bearings can be replaced as necessary, which means getting in there to see what's what.
You should be able to get a quote with the part costs listed. Hope that the fly wheel and release bearing are okay (bonus), but budget for replacement just in case. Indi labour rates are less than half MD rates in my experience.
Hope you get it sorted without unnecessary cost.