I think your definition of "suggests" is different from the legal definition. The under cover officer would generally ask/say things like "what do you have" or "what can you sell me" without specifically asking the dealer to sell an illegal item, however since it is the dealer's business to only sell illegal drugs he assumes the officer is referring to some kind of illegal drugs and proceeds with the sale
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Undercover officers quite routinely and explicitly offer to purchase specific drugs, or ask for them, or offer to sell them. Think about it. If a dealer could avoid undercover officers simply by only selling to people who uttered the right magic words, nobody would ever get busted.
In fact, an undercover agent who clearly used weird language would "sound like a fed" and in many contexts, would simply be killed on the spot.
The test of entrapment is not whether magic words are uttered, but whether the person was inclined to commit the offense already. So for instance, a DeLorean, who never had anything to do with drugs until, in bankruptcy, he was repeatedly importuned by undercover federal agents to get involved in cocaine dealing, was acquitted based on entrapment.
It should also be noted that entrapment is an affirmative defense. This means that, the prosecution having otherwise proved its case, the burden shifts to the defendant to prove the defense.
The critical factor in an entrapment defense is not magic words uttered by an undercover officer, but whether 1) the intent to commit the offense originated with the government; which then 2) persuaded the defendant to commit the offense (merely providing an opportunity is not entrapment); and 3) the defendant was not otherwise willing to commit the offense. If the defendant raises these three elements, the government must prove beyond a reasonable doubt that entrapment was not involved.
The very fact that most defendants, including these SR2 defendants, are already in possession of drugs in amounts sufficient to deal, possess bags and scales and other dealer paraphernalia, and/or are readily willing to and have the knowledge necessary to acquire contraband, all goes against 3). That is, it's pretty solid evidence (if and when the government has it) that the defendant was predisposed to commit the offense.
Such a predisposition negates entrapment.