Toys R Us has the MiWorld sets for sale, but the TRU I went to is only carrying the Sprinkles version for $14.99 (larger sets like Claire's are supposedly $29.99). However, they did have a display set up so I got to see what some of the others look like.
Even though the sets are 1:12 scale it really looked to me as if the accessories could be used for 1:6. They were carrying a huge amount of Collector Packs for $2.99 so I figured, what the heck, and bought a bunch. They are AWESOME and will work great with your 1:6 dolls! Check out Cleo modeling the scale.
Although the sets themselves are small, I can see them selling out and probably not making it to clearance prices. If they do, I would snap up every single one. Just going on the accessories alone, they are extremely well made. I am very pleased with the sturdy materials used and their attention to detail. It's all so cute!