I remembered during my school days, my first camera was a Praktica BCA with a 50mm Carl Zeiss Jena lens...tat was the good old days!!!
Anyway, Praktica is a east german made camera and it is not a collectors item.
The resell price of this system is often very low, I dun think you can get good price to sell.
One reason why Praktica has little value is because they are one of the first mass-produced cameras in Germany. The cheap cost of a Praktica enabled it to inflitrate a lot of markets and it's the chief reason why there are still so many to be found around. But make no mistake about this, Praktica cameras are pretty good. Although many models are copies of Contax cameras, some Praktica actually had some proprietory innovations.