Say if I were to win the auction and get an acceptance from the bank on my bid/offer, do I become responsible for it? 

These properties will require a group deciding if they will accept your offer or if they will have another sale with these properties. 

They are still getting back to me on what they would want, personally I don't care what they want for the property if it doesn't fit my threshold of an acceptable deal, 2. but realistically thinking of Cap rates and what could be done to increase the value of the property once bought.

As the strategist in putting together deals you must concern yourself with 1) end goals of all parties  2) experience and skill of all parties  3) the fears of all parties  4) the emotional condition of all parties 5) The risk acceptance of all parties 6) the comfort level of all parties and 6) your strength of relationship with all parties.

I tried to offer lower but seller wont accept it. http://www.zillow.com/homes/930-Saxon-Blvd-Deltona...Is the cash purchase price too much?

I was told by a retired realtor agent that if the bank accepted my first offer right away i probably offered too much, and said this type of negotiation are done on a going back and forth pace. 

Everyone, including me, focused on getting the child support lien holder to accept a partial payment and allow the sale. 

Don't expect the agent to recommend the seller accept if you can't show the ability to actually buy though.

With HUD and with FNMA , if damages or vandalism occur after the contact is accepted and prior to closing you have a very good case of getting compensated as I have had it happen many many times

You have all these folks that don't even know what to do with a lead spending money sending out this stuff ... when if they were smart they would spend that money getting a RE linense and learn the business and become a RE professional than a wanna be investor wholesaler with no money and what ever credit and money they had just went up in smoke sending out letters with no ability to follow up or keep the campaign going there is no doubt you can get business with direct mail but most don't understand its a multi year commitment and many thousands of dollars. if you just blow your wad and your done then you will be broke and done and off to your cube to work for the man LOLPS I don't send out colleague request as I don't know how to do that I only accept them.