I've had positive multiple shopping experiences with following online sellers.
cropstop.com (US)
ucutathome.com (US)
allthatscraps.com (US)
bargainpack.com (US)
cmitonlinestore.com (US)
stampingscrapping.com (US)
stores.ebay.com/septemberplayground (US)
waltzingmousestamps.com (UK)
bluebazaar.com.au (AU)
idealpapercraft.com.au (AU)
bizzybecscardmakingscrapbooking.com.au (AU)
scrapdragon.com.au (AU)
annascraftcupboard.com.au (AU)
handmadebysuzanne.com.au (AU)
craftcontainers.com.au (AU)
iamroses.com (Thailand)
crafthouse.co.nz (NZ)