Don't sell across the counter to anyone without a contractors license or electricians license. If you do decide to sell to the public, have a small counter space reserved for non-electricians. I don't know how many times I've had to wait while a salesman explained the finer points of a 3 way or other electrical item to a DIY'er who should have gone to the big blue or orange box.
I hope you never decide to DIY duct work in your house, Tom. The HVAC supply guys have this down COLD! The big boxes don't carry a fraction of what you need, and it's such a freaking PITA to get any of the HVAC supply houses to sell to you without lying to them.
That two that finally would sell to me (one local and one online) are now $500 and $2500 richer respectively. And the others? Well, I'm sure they've got plenty of business and don't need mine.
