there was other posts with drop rate data samples, but I cannot find. Here is my data. I know that it is not so much - less that 1000 samples, but for me it was interesting to calculate price of full item (just 20 or 50 prototypes) based on price 50 crystals for 120 credits
http://i.imgur.com/pPamxgY.png
Columns from Quantity to Days are helper columns - don't look at it
EDIT: for shards from Cantina I've got data just for Finn (5C)
Sims - 175; Shards - 55; Rate - 31.43%; PRICE - 31.82 crystals/shard