A lot of people in the business would pay e.g. $5,000 for exclusive rights for something that worked this well in 2009 (with proof that it worked in 2009, e.g. verifiable broker statements), and a smaller amount (say, $5,00) for non exclusive rights.
If he claimed it still works but he wants to sell it, it is a completely different game -- because when these things work, they are cash cows.
The guys you want to work for (2sigma, RenTec, Jane Street, Susquehanna, ...) are unlikely to call you up as a result of this blog post / hacker news exposure/discussion.
If you want to go back to trading, you'll probably have to actively try to get a job -- at the very least, let someone who's still in the business know that you are looking. In my experience in this field, word of mouth and friends-of-friends are infinitely more successful hiring strategies, for both sides.
(Re:releasing the source - I would like to have a look at the strategy, but I would recommend against releasing anything that is even close to being useful, unless you want to spend the next year screening "where can I get a good XTAPI broker" and "I've got XTrader_PRO set up, but I'm getting error 10013, what gives?" emails).
the Nuclear Phynance message board is probably a better place to look for business offers.
My SaaS is Bunker App (https://www.bunkerapp.com/), and its customers are freelancers. I don't know if this qualifies as B2B since most of my users are single freelancers or at most small shops.
How about new lifestyle business referring to themselves as new lifestyle businesses versus referring to themselves as startups? How should a startup call itself not to be ambiguous?
Good luck with getting a consensus definition of "startup" on even this website alone. A lot of the advice that I read here is applicable to a "lifestyle business" - because I still have to make many of the same decisions with regard to product, marketing, hiring etc. I have some different constraints and optimization targets but that's true of any two businesses.
