The Dakota rifles can be ordered in all kinds of finish and woods, so there is a wide variety out there, both new on the shelves of stocking dealers, and in the second-hand market - so prices run the range, too. Because the Model 10 single shot lends itself to engraving and very high end wood ( being in two pieces instead of one large one), those prices have a wider range. Don Allen wanted to make a rifle like the Winchester Model 70 Custom Shop, but more choices and his cartridges, but manufactured for less cost than a hand-built custom rifle by one or two builders.
I think my Mato was actually a Model 97 action, which is a bit slimmer than the Model 76. They both take the same bases and rings. Mine came with Talley case-colored bases and rings, and actually said "Dakota" on the action, along with "Beretta" in large script. Mine was an early model, which appeared in the Beretta catalog, for about $2,400.00. Later models just said, "Dakota", and came in a nice Brown Precision synthetic stock, for about $1,100.00. At that time ( c2000), the Dakota 76 in really nice wood was about $3,300.00. I will check with this nearby dealer and get the current prices and check on some used ones.
Europtic is a stocking dealer with a website. Order a Dakota printed catalog, and get on their mailing list. Then e-mail EurooOtic for pricing of something they don't have in stock. Don used to put out a little hunting magazine with stories about his customers' adventures.