Ok, so im going to a music store tomorrow that is having a 3 hour halloween sale. Im new to sales at music stores, and want to know ways to not get ripped off. Will they still be willing to negotiate? How much (in %) will they be willing to take off (by that i mean what are your experiences haggling with stores, and how much have you gotten them to take off)? Anything else i should know about making sure i get the best possible price? Thanks!