Some favorite freebie grids for resource mining:
hg.osgrid.org:80:Agora
Freebies, Mesh, Complete avatars, Clothes
alternatemetaverse.com:8002:CarpeNoctem
Literally everything
soul-grid.de:8002:Camballa
Clothing, dresses, costumes, buildings
alternatemetaverse.com:8002:Houses
Free Houses
soul-grid.de:8002:Just
Buildings & furniture
gentlefire.opensim.fun:8002:Dwell
Clothes, hair, furniture
alternatemetaverse.com:8002:The Garth
A little of everything, high quality
alternatemetaverse.com:8002:LIGHT and SOUND MUSEUM
Lighting, campfires, sounds
alternatemetaverse.com:8002:Occasions
Holiday gifts and decorations
alternatemetaverse.com:8002:GREEDY MUSEUM
Greedy games of all themes
login.aviworlds.com:8002:The Furniture Vault
Massive furniture store, all kinds