IMO, in that era, the Intrigue with the CAT was the sweet spot in the CC lineup. Solid build, great features, slide out generator (We miss not having that on our 04 Allure.), and the BIG BLOCK CAT means never needing to say sorry while climbing a hill
I too would not let the PTO or age, or low miles bother me. I would do the normal coach inspection to check out overall condition of all systems. This would be worth either taking it to a reputable RV place for full inspection, or hire a professional to go do the full inspection on site. Chassis, engine, and drive chain related items, I'd also have looked over carefully. Pull samples for analysis.
Then as Don said, unless the coach has documented service records. I'd budget and bake into the purchase price, a full refresh of fluids, belts, hydro hot service, generator service (Belt here too.), etc. And of course age of house and chassis battery factor here too. If it has the Norcold 1200, I'd make sure the recalls were complete at very least. But would frankly also budget into the experience the change over to residential fridge. (But, that is a matter of personal choice
Check the age of the tires, if over 7 years old, I'd bake that into the price too.
I have the mentioned 04 Allure, the galley is why we're driving this rig, as I made the mistake of letting the DW see this coach as we were looking. Thus, no BIG CAT for me
! We felt the coach was worth investing in to make it 'our coach'. We plan to use it for about 10 years, then make a decision on what we'll do next. I feel the 04 Intrigue is also a fine coach to invest in for the long haul.
Best of luck to you,