how much is a solid running mariner 175 EFI going for? 

What year?

A lot and too much!  Because of the crazy prices new motors are going for, used motors have also increased tremendously.  A lot depends on the area and the motors usage.  Just stay away from saltwater motors.  People are trying to jack the prices up on those also, and they are not worth it.

Since Mariner is the salt water version of Mercury, it's a good chance that's what you will find.

On 6/13/2019 at 1:26 PM, WRB said:

What year?

97

If it has good compression and runs good, and not a saltwater motor, from an individual, probably in the $2500 to $2800 range.  From a dealer probably in the $4,000 to $4,500 range, especially if he provides any kind of a guarantee with it. 

Outboard motor prices are also very subjective to location.  I can find them a whole lot cheaper around the southeast than people in the northeast seem to. 

Also, because of the limitations AZ has placed on areas 2 strokes are allowed, (if they still have that) 2 strokes usually go fairly cheap.

11 hours ago, JTP said:

97

Mercury/Mariner has change from Export market to salt water market and I don't recall when changes occurred. If the engine has a 25" long shaft it more then likely is the salt water version. Most bass boats run 20" shaft OB's, the long shaft for higher transum boats.

Price depends on hours and condition as Way2Slow pointed out the older 2 strokes may not meet today's emmison regulations. I believe Lake Mead restricts 2cycle engines older then 2006.

Tom