A very poor idea, in my opinion (sorry to shoot you down). Assuming you have a record, High schools and schools in general tend to have a great amount of cameras in the vicinity, especially in urban areas (basing on where I am from).
It won't take long for a student to report you to the police and get in contact with the school (which will be very easy to do), followed by figuring out who you are and tracing it back to the other fakes being sold throughout the state.
As clever as this whole thing might seem, it will be very easy to figure out that someone is jumping between towns selling these things. One photo taken of you selling this iphone in 'city a', and another photo taken of you selling it in 'city b', is enough to get them coming after you (at least if I were one of them).
For the sake of being safe (which I believe anyone in this business should make a #1 priority), it's good to think about these types of scenarios. As unlikely as you think it might not happen, it is still likely.
My suggestion would be the following:
1. Stay away from large public areas, there is always something in the area that can spot you, especially highly populated parts of town.
Especially keep away from selling on government owned property such as, airports, civic centers, theatres, etc. they are filled with cctv (doesn't matter if you think you don't see them).
2. Try altering your appearance as much as you can. A wig with a hat on top, colored contacts to change your eye color and glasses will go a very long way. Even if you have no record, other people can still identify you. Make it as hard as possible for someone else to identify you.
3. Keep your prints off of the box. If you've touched it during handling time and you have a record, you are as good as caught.
4. Don't create any patterns during your motives.
5. Don't use any device that connects to your real identity when you are online. At the very least, spoof your mac address and you use an open connection somewhere (unless you have the knowledge to crack the connection). Browse anonymously. Opera browser has the option of making "private tabs" to hide your browsing history. It's not the best of the best, but it's worthy if you are going all the way with this and very easy for the computer illiterate (which most people are). If you do know how to really work with a computer, then you know what to do. On top of that, you would know how to spoof an email address to be used for sending and receiving as well.
Try to avoid calls. If anything, use some form of voip instead of your cellphone.
6. Don't be greedy. Even doing 1 per week is risky in my opinion, unless you really got everything together. If you can manage 2 in one day, dealing twice a month, that will add an extra $1200 (roughly) to your month's earning.
This, in my opinion, is much safer, and still very rewarding.
The less you expose yourself, the better it is. Dealing with 10 people in one day means nothing!
All it means is that you are taking less days out of the week. The fact is, you are exposing yourself 10 times to 10 different people, who will all more than likely report you and have something to compare.
If you are shooting for 10 times, you should consider taking the effort to deal out of state.
These are just my "overboard" views. You don't have to consider any of them.
However, maybe consider this, if you break any of those 6 rules/"suggestions" then you should know that even I could catch you. If I can catch you, I don't see why someone else who is dedicated and has more authority and privileges can't.
Just watch your tracks closely. Selling it to some schmuck takes virtually no effort or even much "social engineering". Its the getaway that gets people caught.
Good luck and most important be safe
