About $5 to $10 if your lucky, and someone is a collector, maybe higher if they want them bad enough. That's my guess.

they are not the kind of jewelry that pawn brokers will lend on...must be gold and diamonds, not base metal and crystals...not valuable at all

Not much

Swaraski crystals cost quite a lot !! I do irish dancing and i have spent about 100 on crystals for my dress but that's about 400 of them!! I would say u would get 10-20 ponds from a pawn shop ?