formaldehyde

The Formaldehyde should be completely disapated by now. But if it concerns you Home Depot used to have home test kits for it from "Healthy Home".

Or get a DIY home Formaldehyde/Explosive Gas test kit...

The Recreational Vehicle Industry Association says...
"Ventilate. Open a unit’s windows to allow fresh air in and run any fans and the air conditioner to lower the temperature and humidity before each trip. If a unit has a pungent odor or you experience any irritation, the best bet is to ventilate the unit."

The rig is in wash state my sister is checking out today.

What's it smell like when you went in it to check it out before buying?

Sparky63 wrote:
Since this rig is 10 years old would there be a problem with the smell

I have breathing problems and am sensitive to odors. We bought a 1998 Fleetwood in 2009 - so it was 11 yrs old. I had no problems with any of the smells that come along with the new units.

Edit: that's not worded very well. Going in new units, the smells give me problems. Our used unit did not cause me any problems.

Since this rig is 10 years old would there be a problem with the smell

Yes There is always going to be outgassing of chemicals in RVs just like the new car smell in cars and trucks.

Can't address your model specifically, but our 2005 had some. It cleared quickly.