This are the most valuable sites that exist, I think, on the net.

General Sites
# Scaleautomag
# ModelCarMagazine
# IPMSStockholm
# AutomotiveForums
# Brian’s Model Cars
# ScaleWiki
# ItalianHorses

Shopping Sites
# GreatModels
# Hobbyeasy
# TowerHobbies
# HobbyLinc
# HLJ
# Micro-Mark

Israel Sites
# Degem
# Harkavot
# CarsForum
# Dgamim

Manufacture Sites
# Tamiya
# Pegasus
# AMT/ERTL
# Hasegawa
# Heller / Airfix
# Revell/Monogram
# Solido
# Academy
# Testor’s
# Aoshima
# FUJIMI
# Italeri