10DEM is almost exactly 5€ (around $6), so, you are not going to get rich on that Better to save them as collectibles. British are still on pounds (and look as if they intend to stay that way), so you should be able to exchange those 60GBP (~$110) somewhere locally.
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Dragi "Bonzi" Raos Q#5196 MkII #080000376, 18GB green MkIIa #040103247, 60GB blue