You don't have to have a written contract to file the charges. An oral contract
The FBI is the US organization that investigates crime involving the internet, telephone, or mail.
There is no "first right of refusal" unless it is a specific condition of a contract, usually written.
By the "could they sue you" question I wasn't meaning that they were really going to sue you, just trying to get you to look at the question of whether there was a contract from another angle.
The other "conditional contracts" like financing, inspection, etc. specifically spell out on them the conditions and what effect they have on a contract so that the conditions, in effect, become a part of the contract. There really isn't any wiggle room because the condition is usually related to some type of performance by a third party, different than what you had here.
I still think you're going to have problems proving that there was a contract. However, if you can make the argument that they approved the condition then you MIGHT be able to argue that the deal to let you take the drawers and look elsewhere and spend all that time and effort was either 1) a part of your contract or 2) a separate contract in and of itself.
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