Probably about what the others have said, £60 to £70 on eBay if you were to clean them up. They look in good condition.
With 36/36 spokes front/rear, they'll be less desirable with anyone building a classic 50s British bike. They'll want 32/40 spokes front/rear and if they want Campag they'll probably want the earlier smaller flange hubs with separate barrels like the old FB design. Original QR skewers are a bonus, they're normally long gone.