I think it has more to do with why they were bought in the first place. While there are a few collectors out there, most of them have been bought just as children's toys and many of the kids that got into Lalaloopsy when they first came out are losing interest in them which is why Lalaloopsy Girls is coming out now to get them back into Lalaloopsy with something more relevant to their interests. Meanwhile the kid's parents are trying to clear out toys their kids aren't interested in so a lot of them are on the second hand market which drives the prices down.