Thoughts:
1. X2 on the timing belt and that needs to be factored into what you pay. Full TB job with Water Pump parts along runs ca. $600 depending on where you shop and the job with WP takes somewhere on the order of 5-8 hrs depending on tools and experience level.
2. Whoever the PO was they knew a thing or 2 about the vehicle so I wonder if it has a GDE tune. Call Keith with the VIN and ask (NOTE those mpg figures are realistic only with the GDE tune otherwise it's more like 18/19-27/28). I say this as it has a) the gasser high mount air intake; b) as noted aftermarket CAC hose at least on the passenger side based on orange color but I don't know what brand (never seen Samcos with a woven covering): and the filter head appears to be the Racor (
viewtopic.php?f=98&t=36977) with a fuel heater added.
3. looks like a Prestone flush-n-fill "T" installed in a heater line. I think it's the one from the viscous heater to the heater core. If so it's likely a good coolant flushing tool.
4. invoke an instrument cluster test (by holding the trip odometer button while turning the ignition on) to make sure all the bulbs and gauges function properly especially that the CEL light works. I cannot find a nice simple summary of what it does in sequence but the 2006 FSM (download from NOOB site), which refers to this as the Instrument Cluster Self-Test, (beginning on page 8J-65 and scattered thru various pages to 8J-87) does discuss what the test is supposed to do with respect to various lights and gauges on the dash.
5. coolant looks like very light pink which suggests it's the proper HOAT coolant
6. not sure what they mean by "steering wheel controls" but if that's a reference to the buttons on the "back" of the steering wheel that control the radio (see Owner's Manual which can be downloaded from the Jeep web site or may be hiding on the upper shelf in the glove box) be sure the check and see if they work with the aftermarket radio (they should but it requires special wiring to do so). FYI if any of the door speakers "buzz" they will have to be replaced (expensive as the front speakers have an integrated amp) or will need new surrounds (aka refoam) kits installed.
7. cannot see the battery but if it really is 600CCA that's about 100CCA below the minimum requirement. Figure a new Interstate 85 month group 34 battery will run ca $125 with 800CCA
8. I have no clue what they mean by "Enhanced accident response system". As far as I know, have owned 2, there is no such thing on the 05 model. The 06 model had electronic stability control which is likely what is being referred to.
9. BOTH external mirrors should be power controlled from the driver's side
From what I can see it looks clean and lightly modified by a PO who had a clue regarding some of the basic mods for the CRD which is a good sign. I suspect the PO decided to move on before the TB job became necessary at 100,000 miles.