You will need to contact Ithaca. Published sn's do not go that high.
100-400 USD
1973 - Ithaca Model 37 Featherlight
Depends entirely on age and condition - neither of which is indicated in the question, so no way to answer.
The serial number indicates your standard-type Model 37 was manufactured in 1953.
The serial number indicates your standard-type Model 37 was manufactured in 1953.
1963
I recently sold mine for $325
http://www.diamondgunsmithing.com/index.html
The Ithaca model 37 feather-light 12 gauge shotgun serial number 371269762 is valued at $200 in fair condition. In good condition, it is valued at $925.
100-400 USD
about a 150 bucks
Your Model 37 was mfg. in 1975.