Re: 2006 Ford E-350 Quigley with 6.0 Diesel, 37k miles, 26K
If that is what you're looking for you'll be hard pressed to do much better considering the miles assuming you could negotiate them down a bit. I have an 05 with the 6 liter and it runs great. You'll want to spend about $1,500 upgrading the EGR immediately. This is not optional in my opinion so keep that in mind. If you can get them down under $25k somewhere then I think you're off to a pretty good start.
2015 Chevy Express 3500 Duramax
w/ Quigley 4x4 & Agile Fox shocks
Sold 2005 E350 Chateau
Quigley with Agile RIP, 6.0 PSD