Volguuz -- even if you attempt to sell a company its [exact company name].com at a very "modest" price, chances are only about 10-20% they'll express any interest at all, and less than 5% they'll proceed with the purchase. When you throw in additional levels of indirection (.net instead of .com, hyphenating the domain, adding an "s", "inc", etc.), those odds drop off exponentially.
There might be less of a dropoff if your domain corresponded to a real financial product or service, but I bet you couldn't articulate what a "mortgage financial" is -- because they don't exist! No more so than a "grapefruit apple", "algorithm software", or any other two similar terms put together. If I were attempting to sell you a product you found out I hadn't a clue about its composition, use, or corresponding industry, wouldn't that turn you off?
You should only attempt to flip domains whose keywords you could RESEARCH. Maybe it has a Wikipedia entry (e.g. "energy crops"), an explanatory website w/ directory of major players (e.g. "lawn greetings"), or has alternative TLDs which forward to major players in the business (e.g. "shed designs" -- ShedDesigns.net is a redirect). You need concrete evidence that endusers have found labeling themselves with your exact [keyword].sometld has raked in dough to optimize your profit potential -- and trust me, a 15% "I am interested" response rate on sub-$100 domains is quite optimal in this business.
Addendum: I would advise staying AWAY from finance domains since the space is ridiculously overcrowded. I've only managed to flip a couple of purely financially oriented domains, and not for high amounts. Stick with consumer goods, the trades, software/technology names, and GEOs.
