I know it difficult to give an estimate if you don't know exactly what i want but I don't want to tell the world about my idea so I'll be as clear as possible.
Basically the applications (desktop & iphone) will cross reference three different databases and return the results with about 5 or 6 search filter options. Then the second part of the app will cross reference the data results from the first search with about 3 or 4 online API's and then deliver the final results to the user. That pretty much explains the functionality. I know its still rather vague but I hope thats enough for someone to give a rough estimate of what price-range I'm looking at.
Any advice on this would be brilliant.