More than you got. $800 for the .308 caliber in pre 1964 $1500 and up for the .284 and .358 calibers in pre 1964 (spare magazines are $100 each for all calibers if you can find them) The guns made after 1964 are not as good and all of them should run less than $700 depending on condition.
In order to give you a more accurate value on your winchester model 88,I would need to know the caliber of the rifle,and what condition your rifle is in?
There is no such rifle, the Winchester Model 88 is a highly collectible lever action center fire rifle available in .243, .284, .308, and .358.
Your serial number indicates that your Winchester model 88 was made in the year 1967.
1966
anywhere from $600 - $900
Your serial number indicates that your Winchester model 88 lever action rifle was made in the year 1959.
1971
Your question cannot be answered unless you provide a serial number to the Winchester model 88 lever action rifle in question.
1962
Sarco has them in stock there part # Misc119
With the serial number that you have provided,your Winchester model 88 lever action rifle was made in the year 1966.
The gun was made in 1956