To start with, I would park them. But find a provider that allows you to do some non-fraud promotion (links, not clicks) of your domains. Most parking services don't, but some do. Park the domains, and optimize them, then get some links to each one. If you don't get at least a few links, then you may get so little traffic that it's not worth keeping the domain for income alone. Expect between 30-100 uniques a month average. The $30 CPC is nice, but with adsense all I ever see is a max of about $2. That's for ad clicks. Clicks from Search box results is more and may reach closer to that amount.
Then if you are getting traffic, but few clicks, that domain should be tested with a mini-site. I would also try making a single LONG page with unique content and see how that works for you. Try selecting only AdSense image ads, they help to keep your site looking like a MFA.
Some of your domains are better than others, but all would look better if you Camel-Case them when showing them to others. Like CarInsureanceDenverColorado.COM
CarInsuranceInFL.COM
Many of these can be pitched to end-users when you have time. If you can talk about traffic and earnings it will spark more interest. Many of the end-users will know how much the CPCs are and it's easy to sell domains for $xxx-$x,xxx if the yearly traffic * $30 CPC exceeds $xx,xxx. Say I am only paying $10 per click. I will be paying $900 a month for 30 visitors, and of those 30 maybe 1-5 might become clients? If I can get a domain name for $1k-2k and it can deliver the same thing, I'm doing good.