Assuming you mean the Weller Reserve Green Label. The 12's are the Black Labels. They're a really nice wheated bourbon for the price. The 12's tend to have too much char on the finish for me, but once they have a few months to sit, the char seems to fade and leave a real nice finish (albeit a short one).
Bottom line on the Weller's, if someone is offering a market rate, sell it. There are nicer bourbons you could buy with the money. For instance, Yellow label Wilderness Trail would blow either out of the water. I liked the Maker's 101 better than both Weller's as well. Using those two as examples because they are both wheated as well.