Hmm, yeah - could be my fansite...
Funny name, but I like your idea behind it. The mis-selling of endowment-backed mortgages does leave an area for exploitation and this would be a very brandable name for that purpose due to the double-entendre.
I think you should get this on sedo and start contacting some mortgage providers and really hunt for an end user. To a reseller, I think you may see low-mid $xxx max.