#1
i want to get a wireless guitar system...how do they work with pedals?
and what would be the price of a good one?

i saw this on musicians friend
http://www.musiciansfriend.com/product/AKG-WMS-40-Dual-Wireless-Guitar-System?sku=275693
#2
*tries to think it through?*
I'd imagine with the 2 transmitters, plug 1 into the guitar, the other on the end of your daisy-chain, & it'll work that way. Maybe it might be worth reading the Manual, see what that says.
The rig:
Gibson SG faded special -> Marshall MG 50/100 (working on a valve amp)
Backup: Vintage AV1
Newcastle United
#3
They work fine with pedals. The usual problem is getting the channels set up.