I have a panasonic microwave, which I believe works perfectly.
However the bulb has gone.
There is no easy way to replace it and in fact the instructions say to
get it done by a technician.

I have received 2 quotes
The first offers to replace the bulb at a total cost of 1000% of the
cost of a bulb.

The second offers to replace it and service the oven for 2000%. This
would be attractive if it needed a ervice

When does a microwave oven require a service - and what can be
serviced anyway?