$300.00 if in decent condition.
Marlin
1966-1970: along with its brother model (marlin 336) 7,289 were manufactured. http://books.google.com/books?id=iRb3ioTApJ0C&pg=PA616&dq=westpoint+model-33
Made by Marlin
No published sn data.
20-200 USD or so
$600 to $700
10-150 USD or so
No known published serial number data. 50-125 USD or so
No published data
A 1950's model 33 bolt action Remington 22 rifle is worth roughly $275. However, this can vary greatly depending on who purchases it, and what kind of condition it is in.
The Model 101 /33 was made between 1933-35. I found a few auctions that have prices that range anywhere from around $30.00 to $85.00. There was one auction for $115.00 but it didn't get any bids, so I would say that one asked too much. Otherwise, it likely depends on the quality of the gun.