t/c contender serial number 308905
You will need to contact Thompson Center Customer Service thru their website.
The Thompson Contender with a serial number of 7000 was made in the year 1967. Thompson/Center Arms is a firearm company that is based in Rochester, New Hampshire
You will need to call TC
Frame
In a TCA, if it has letter preceding the serial number, it was made after 1971.
Contact Thompson Center Customer Service at 1-866-730-1614
50-300 usd
You will have to call TC to find out.
No way to tell from just the serial number.
Thompson Center does not publish date ranges for there guns, but from the number I would estimate the date to be mid 90's
1975
100-300 USD