The made them from 67 - 83, they are date code stamped on the barrel, the location and chart is on the Remington Society of America.
1000$
$350.00
100-400 USD
I will first say that the Remington model 788 was made in 6mm from 1969-1979,at this time they are going for anywhere from 250-450 dollars depending on condition.
$500-$600
100-400 USD
100-400 USD
Consider yourself lucky if you get 300 dollars for it.
Can't be answered without a serial number.
The Remington 788 model rifle was a great shooter in the few years that it was sold. A nice functional 788 in 22-250 should bring between $200 - $450 depending upon condition and any accessories (extra magazines, scope, mounts, etc. )
the 243 was new in 1969 its 375.00 in 100%
100-300 US Dollars