Suzuki DT25 have any value?

[southeast texas suzuki]

I have a 90 suzuki DT25C and i'm curious if these are desirable engines or not? I have heard that to some, they are very popular, but it seems that there are almost no parts available and very few actual motors for sale nationwide. Mine runs very well, but a tapping just developed last time i took it out after investing a fair amount of time and money into it (all suzuki parts). I'm at the point where dumping anymore money into it just isn't worth it to me. So I figured this would be a place to find out whether or not it holds any value. Thanks