I am, however, extremely confused as to how that doesn't register as "shady" to either of you.
LOL under the table money makes the small buisness world go round. Without it probably over half of the card shops you know would close. You see the IRS holds no value on secondary collectables such as comics and cards. Therefore there is no write-off on the sales of these type of items.
Take for example a Lotus I buy for $500, I sell it for $1000. Instead of only showing the $500 profit, I have to show the whole $1000. Do this a few time and suddenly I'm paying taxes for double the money I'm making, Showing increased revenue can often raise my annual business tax, etc. etc. How long do you think I'll stay open paying double my tax base?
In all the instances that I've encountered it, there has only been once when it was simply a friendly gesture.
Not that you said so, but you leave the impression that illegal activity done as a friendly gesture is ok. The bottom line is a store has one main function, and that is to stay in business.
Sure friends are made, great deals are given as possible, but the bottom line is the store must succeed.
Generally speaking, people that engage in unreported income also engage in other unsavory business practices as well.
I might ask where you get your statistics? Chances are alot of people you know/will know have committed such violations. Know anyone who ever cut the grass, wash cars, or other various odd jobs? Did they make more then $600 that year? Bet they didn't claim it on their taxes. How about cards sold on Ebay or to friends, see anyone filling out tax forms, or collecting sales tax, or produce a vendors/sellers permit? I doubt it. How many of these people do you consider unsavory?
I'm not trying to approach this from some sort of ethical standpoint, but you should at least pause and raise an eyebrow every time you see it going on.
Hell, my eyebrow would be frozen in the Spock position.
Also, the fact that he insisted we pay cash on a transaction that was between $600-$700 does not strike me as incidental or unrelated in any way, and certainly shouldn't be evaluated seperately. If the sale is unreported, and the cards are indeed fraudulent, we are left without recourse in just about every practical sense of the word.
There are actually a couple of points here.
The fact that he "insisted" could indeed cause a bit of concern. In general if a business accepts various forms of payment, then they must accept them. Not to mention the fact that, insisting that a customer pays a certain way, when they wish to offer payment in another form you accept, is poor form.
Even in a cash transaction a hand written recipt should have been offered. Yes I know this goes into the whole double reciept books issue. Of course it would be in the store owners best interest to offer a refund if something was wrong. Chances are he doesn't have much of an advertising budget and relies heavily on word of mouth. The thought of some pissed off gamer telling everyone in the neighborhood what a rip off they are should keep the owner on the straight and narrow. Let alone the thought of said pissed off gamer camping on his doorstep protesting.
Then there is the fact that if your buying high dollar cards you should be able to evaluate them yourself. As long as your comfortable with the card it should be good.