I think this is a GREAT idea. I would lean more towards the freecycle approach. This way instead of the unused products ending up in the landfill they are being "Recycled". This way people that can not afford much for their pets will have the oppurtunity to get them more
I am for pet products only but would also like ALL products available. I definately would like to recommend the NO PETS FOR SALE or NO PETS FOR FREE posts policy as mentioned above....I am looking forward to see this going ahead