If I may comment here.
Financexaminer is correct, a listing agent has a fiduciary responsibility to his seller and all information should be assumed to be told to his seller. But you mention that the agent is someone you are working with. If this is the case, then the agent can be a dual agent which means certain information should (key word) not be conveyed between parties. His suggestion that you get your own buyers agent is a good one since they will have a responsibility only to you. Your agent can get the comps for you but you should never use active comps because they have not sold yet. Use sold and look at expired to see what didn't sell since it may be telling a story about what isn't moving in the market.
As for letting the other agent do the negotiating. Again he does not have your best interest at heart and it can take forever if the agent is not experienced in short sales. Missing/incorrect paperwork is not uncommon and the agent can 'sell' the property to others while your offer sits on the loan mitigation officers desk (known as backup offers).
Since this is a townhouse, your comps would be best from the same complex and if not, then the same layout in a similar complex. Financing can be an issue with these as well so make sure your buyer has financing if you plan to flip. Also, make sure to get a copy of the home owners association's paperwork so you know what you can and cannot do regarding your townhouse since you own the walls, but not the common property the townhouse is on.
Unfortunately I have listed a bunch of caveats and I don't mean to dampen your enthusiasm, but I would not want this to be my first deal (which it would be if I were in your shoes). I would trust that another deal would be coming soon. But that is my two cents.
Mark