The 6mm Remington is actually a very good cartridge, but it's never had a big following. It's definitely a round worth reloading for, if you don't already. mshootinit is right on about the price, if it's in the shape you describe, anything under $600 was a good deal. the 6mm's tend to be in better shape than the .30-06/.270/.308 ones out there, simply because they are shot less because of the ammo rarity. I have passed on several in 6mm, I actually try to pass on any 742's unless the action is in the same shape as you describe yours. I did pick up a .308 in that shape, but the wood was cracked at the wrist, for $169. I replaced the stock, (20 ga. 870 stocks work well on a 742) and gave it to my son for Xmas about 5 years ago.
My first deer rifle was a 742 Carbine in .30-06. It was well maintained, (bought it from my aunt) and I shot only my fairly light handloads in it. I harvested several deer with it, as did my aunt before me, including her monster 12 pt. Northern Wisconsin buck.