Can someone give me some info about this topper? its in really good shape, and I feel like it could be worth something, but really cant find any info online.

Its a glass lite camper shell, for a 1st gen longbox





any info would be appreciated.

 

Not familiar with them but it looks like one that was sold around here under the "Fibrebec" brand name.
fwiw on that truck it is also very similar to the Toy Story truck...