Hi mm.......welcome to TFF.
Yep......those are both pretty rare. Less than 200 manufactured.
Here are the Blue Book prices (in .284 Win.):
Model 70 Classic DBM:
100% - $695
98% - $650
95% - $550
These values are about $220 more than for the standard Model 70 DBM in the same condition......but only in the .284 caliber.
Classic DBMs and standard Model 70 DBMs in other calibers are worth about the same money.
I don't know how much the 'scope adds.
About the magazine......have you tried calling Winchester Parts & Service at 1-800-322-4626?
I checked the Gunpartscorp website.....lotsa parts for the DBM:
But no magazine listed there.
Might worth giving them a call, though: http://www.e-gunparts.com/cantfind.asp
Worth a try.....it can't hurt.