Yes, that is considered illegal under the law. Yes, the law would consider you a dealer. Yes, if you break the law you should suffer the repercussions. Whether or not I agree with it doesn't matter at all. Neither yours or my opinion will land your ass in jail. Breaking the law will.
Like I said, it's a matter of perspective and at the end of the day it isn't your perspective that matters. That's thin ice to be willing to tread, all for the possibility of making a few dollars. No thanks...not this cat. I'd rather go get a part time job on the weekends if I were interested in making a few extra dollars.
Really?
"... Determining whether your firearm-related activities require a license is a fact-specific in-quiry that involves application of factors set by federal statute. This guidance is intendedto help you determine whether you need to be licensed under federal law...
... Federal law requires that persons who are engaged in the business
of dealing in firearms be licensed by ATF. The penalty for dealing infirearms without a license is up to five years in prison, a fine up to$250,000, or both.
A person can be engaged in the business of dealing in firearms
regardless of the location in which firearm transactions areconducted. For example, a person can be engaged in the businessof dealing in firearms even if the person only conducts firearmtransactions at gun shows or through the internet .
Determining whether you are “engaged in the business” of dealing in
firearms requires looking at the specific facts and circumstances ofyour activities.
As a general rule, you will need a license if you repetitively buy and
sell firearms with the principal motive of making a profit. In contrast,if you only make occasional sales of firearms from your personalcollection, you do not need to be licensed.
Courts have identified several factors relevant to determining on
which side of that line your activities may fall, including: whetheryou represent yourself as a dealer in firearms; whether you arerepetitively buying and selling firearms; the circumstances underwhich you are selling firearms; and whether you are looking to makea profit. Note that while quantity and frequency of sales are relevantindicators, courts have upheld convictions for dealing without alicense when as few as two firearms were sold, or when only one ortwo transactions took place, when other factors were also present."
The above doesn't sound at all like what I described.