Nothing to lose, sow them and see.
Bunny, only one way to find out, make up some trays and broadcast the seed on them see what you get.Budget seeds are usually old seeds shops and GC's want to get rid of so do we know how old our seed really is?We are told that seeds stored for many years will germinate given the proper treatment so go for it, what is there to lose?
One way to test germination (and thus avoid wasting time and garden space if they turn out to be too old) is to try putting a few seeds on some damp kitchen paper. Cover with another sheet of damp paper and put them somewhere warmish and darkish. Keep them damp, check them every few days and if they show any sign of little roots or shoots, you know you've got viable seeds.