Here are your sale/brand options.
Tool Truck (Snap On, Matco, Mac, Cornwell)
You play by their rules and die by their rules. The business model is set up in a way that they make more money by your failure than success.
Conventional Whored Out Brands (SK, Gearwrench, Mountain, Makita, IR, Sunex, GP)
Everyone knows what they are worth. The cheapest place to get them is amazon and tooltopia. You'll have a hard time selling them.
Semi Exclusive Brands (Genius, Grey, Toptul)
Not as easily accessible by consumers, hence less arguing about price. However, now your fighting to convince buyers these are even worthwhile brands. Also, many have incomplete catalogs, so you'll still have to suplement the gaps with more popular brands, so again, see above.
Used (like the company "Used Pro Tools" in NJ)
If I did it again, I'd try it this way. Go find deals like someone selling a box with tools on C.l. for $4k. Break up all the sets. Sell everything for 50% list. Now you have all the prestige of a name brand you without the warranty issues. Also, no need for credit as your selling at such a "bargain" it's a take it or leave it case. No special orders, just roll in as a mobile flea market. Then post the empty box back up on C.l. for 2k and out it goes. Or find a local finance company and try to get one of your customers to buy it for $2500.