Help for future owner

[Britus]

Good Morning.

I am a BMW and have owned 7 of them over the years, but have always wanted a Boxster as a second car. Recently bought a new 550i and thought that would make the urge go away, but guess what it is still there. Have been doing research on this site for about a month now and am ready to buy a early model weekend car for fun. Probably want to spend in the $10-18k range and am located in the Dallas area in Texas.

My question is outside of Craigslist are there other good sites to look for owner owned vehicles for sale? It seems the majority of the ones here are dealer driven, and some do and some don't have any type of records. My hope is to find one with the IMS already done, but not sure if that is super realistic. Sorry if this is a dumb question, all my cars have been bought new so this is first time venturing in to the used car market. Any other advice would be appreciated.

All the best