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Let me see if I can give you some pointers from a buyers point of view.
First I only look at .com or cctld ( in this case co.uk ) there is no traffic in .biz, .org. If I bought the .net or the other extensions, I will always lose traffic to the .com. . Net can in a limited number of cases be worth buying, but for me that would be a one word generic or very high traffic 2 word.
If you are going to sell a 3 word .com for me I would need those words to be how someone would search for that product, and with the additional benefit of type in traffic. a name like ChristmasGiftIdes.com or AdultHalloweenCostumes.com . Regards the domains you listed here, the first part of the names are ok, instant credit is good, but I don't think someone then looks for a instant credit deal. He may look for instant credit repair, instant credit cards etc, but not instant credit deals.