Some new cosplay/ new anime,  cosplay shops will bring out the crowd funding/pre-order to see how the market react to this cosplay.  

Buy the deposit to join the crowd funding/pre-order. When the seller get enough deposit, they will start to make the sample and calculate the full price of this cospaly. Then the seller will release the remaining balance. 

Cosplay price = deposit + remaining balance

Once buy the deposit, it cannot refund. Unless the seller cancel this crowd funding/pre-order because of few people join. 

For such items , normally  the waiting time is unsure ,please arrange a schedule before check out .