Questions on IFD540 and Garmin 530

[av8ator1]

Currently have a Garmin 530 non WAAS and a lynx transponder with dual G5’s.
I would like to remove the 530 and install the IFD540.
My questions are:
-What is the going rate for the total 540 install? Please send a private message if that’s more comfortable.
-what are our thoughts on that 540?
-what do you think I can get for the Garmin 530, it has the terrain and has about 123 hours since new in 2015.
-any thoughts on what version of the 540 to install?
Utmost thanks in advance

 

[Forkauto]

 

[Orest @ CYFD]

 

[av8ator1]

 

[wgrasqu]

 

[paulro]

 

[jruhnke]

 

[philiplane]

 

[Jesse Saint]

 

[philiplane]