I'm looking at a 2005 volvo s40 none turbo with 90k miles. Any tips on what to look for or stay away from. Thanks

If it has a sunroof, you need to check the drains and make sure they are working properly. Poorly engineered system - esp. where the hoses fit into the drains in the corners of the dash. I have had mine "fixed" multiple times - never successfully. Finally, I fixed it myself by spending $10 on 6" of rubber tubing and waterproof silicone. Spliced an extra length of the tubing onto the existing drain hoses and used the silicone on the splice and where the hoses fit into the dashboard drains. This is a very well known problem w/ Volvo... Just Google "volvo sunroof drain class action". Other than that, I love my car. Good luck.