Welcome to the RCA website. I had hoped a more knowledgeable long gun person would address your questions but I'll give it a shot.
Saying that they are in ""excellent"" condition is kinda hard to grade but without more detailed information I'll give you an estimate based on the Blue Book Of Gun Values in which some Ruger folks have yearly input.
The M77R .300 magnum #73-64653 looks like it was probably made in 1978. Unless it is one of the special ones made for the Rocky Mountain Elk Foundation, the range of values from the Blue Book Of Gun Values is a good estimate of your gun's value. At 95%-98% the value is in about the $400-475 range.
The 44R .44 magnum Carbine #103-05562 was probably made in about 1982. At 95%-98% probably in the $400-500 range.
The KM77RBZ MKII .30-06 #785-52544 looks like it was probably made in 1998 and has the laminated two tone light and darker walnut stock. At 95%-98% probably in the $400-475 range.
Hope that this helps you. If a more knowledgeable rifle collector has more/better info. maybe they will chime in.
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