To find out how many were made I suggest you contact Daisy Customer service and ask them directly. (see the link below)
I do have this information; There were two different models of the Side by Side. The model 21 made between 1968 - 72 and the model 104 from 1938 - 40.
Daisy started making air rifles in 1895
30-40 years.
Daisy makes several different model Air rifles each one has a different price. The Red Ryder usually sells for $39 here in California
Just another model in the Stevens line.
Daisy offers a service to evaluate and date old Daisy Air rifles. See the link below.
Daisy offers a service to identify older air rifles. (It's free) See the link below
Both Daisy and Crosman made air rifles for Sears. I believe yours is a Daisy model 800 made between 1957-84. All sears models starting with 799 were Daisy's and all models starting with 126 were Crosman rifles.
To start with which model of Daisy are you talking about. Daisy has been making various model air rifles for over 100 years. Too many to list here. I suggest you ask this question to Daisy Directly. See the link below.
There are several versions of the Daisy 1894. Daisy offers a free service to determine the value of Daisy Air rifles and guns. See the link below.
I own two Daisy Model 1894 BB Rifles (NOT a 1894 gun) both of them have the registration number on the barrel right in front of the rear sight
The Daisy model 21 took .175 BB's, today's BB's are .177. The model 21 is a rare and valuable double barreled air rifle. They were made between 1968-72. An average value for one in good shape, and still working, is around $400 to $525. In like new condition it is worth $800 Personally I would not play with it or damage is in any way.
50-200 USD. Trade name used by J Stevens on their Model 311