What market are you in?

@Dave Rav - I agree with the others that there is no really good way to estimate insurance costs, but I've found some consistency within a particular market/zip code if the rebuild costs and deductibles are the same.

I'm thinking about ramping up my marketing and having agents send me deals with their criteria.

If not, and if these are homes that are in a market where dispositions are not too daunting you are likely best served selling these homes and re-investing in properties that can lead to additional equity.  

I have searched online and found no company or market for this type of transaction.

That is a very general question and each area has its own market conditions so what works well in one area may not in another.

Each market is different, so find out what is best in yours.

Sat on market for 4 months before they dropped to $125k.

Historically real estate and markets are nearly identical over a long period of time. 

So as a listing agent/broker I will need to be more optimized for this marketing and processing of inquiries.