"Better deal" and left hand Model 70 do not exactly go hand in hand, but I believe the WSM calibers command the least attention, then the 7mm Rem. Mag and maybe the .300 Win. Mag right behind it. The .30-06 and .270 generally command higher prices than the magnums but a .375 H&H would get the highest prices. They also made some in .338 WM but you don't see those come up often so they generally command a premium as well.
None of that is set in stone, of course, and prices fluctuate depending on condition. And some sellers were overly optimistic when the market was really good and even more so now that it has gone soft a bit.
There is a LH .375 H&H that's been sitting at $2800 for a long time and the same seller wants a starting bid of $1650 for a .270 - at least it's the same carpet and pair of socks in the pictures.
