My avionics shop splits the labour between electrical work (including design, schematics, wiring, paperwork) and mechanical work such as servo mounting & installation, magnetometer removal/mounting, etc. Any qualified A&P can do the latter, so if one has a favourite A&P with a better rate, he/she could be used to bring the cost of that element down.
Don’t underestimate the cost of install material. Lot’s of little stuff incl wiring really adds up… for an a/p likely 1-2 AMU.
Removal of installed equip can vary, from simple AI & DG to HSI with remote DG & magnetometer.
@ch.ess assume this is for an aircraft with no previous a/p needing removal?
@wigglyamp can probably come up with a fairly current figure. It is always more than you think. And be careful what exactly you are trying to fix; if say you have a leaky static tubing, the new AP won’t fix that.
@chflyer it is likes for likes to your figures AIUI
That is just the hardware.
Roughly double it for the whole offer.
The plane has everything, this was an idea after flying rhis set-up with much joy in a different plane (and the conscious decision not to go full glass).
Possibly staying an idea, until something goes inop.
Roughly double it for the whole offer.
Yes 
You will find it very hard to find an installer if you buy the parts and hope to find one to install them.
There are reasons avionics shops are not posting here.
The “no ILS without GPS” is a real issue here in the UK, but also in much of Europe. It’s a dump limitation. Here.
Peter wrote:
The “no ILS without GPS” is a real issue here in the UK, but also in much of Europe.
Why?
If there is a problem with GPS reception. Not often, but possible and then ILS may be very handy.
