Its 3 bolts, loosen them, the one underneath is best done first. Put a jack under the motor with a block of wood on it. Take the bolts right out, jack it up enough to get the old mount out & the new one in. Start the bolts & then lower the jack. do the bolts up & then do the other side. If all is good, less than 1 hr each side.
The bolt from underneath can be a PITA. Maybe that's why he wants $300.

__________________
Grumpy Old Diesel Owners Club group

I no longer question authority, I annoy authority. More effect, less effort....

1967 230-6 auto parts car. rust bucket.
1980 300D now parts car 800k miles
1984 300D 500k miles
1987 250td 160k miles English import
2001 jeep turbo diesel 130k miles
1998 jeep tdi ~ followed me home. Needs a turbo.
1968 Ford F750 truck. 6-354 diesel conversion.
Other toys ~J.D.,Cat & GM ~ mainly earth moving