How rare is pottery stamped W.P.A. Ceramics N.Dak?

[Joshua S]

Ok I recently received some pottery from a dear family member who had passed,some of this pottery is stamped wpa ceramics n.dak.I can find some very interesting information on the this such organization.But what I cant find is if it retains any value.I would like to know so I can properly store it.Its kinda raw looking stuff,like the stuff I made in art class in H.S. It does have some cool colors though.Some are swirl.and some are just a pale blue color.Anything would be much apreciated