I have a feeling that Day Lilly had a weird release. Something about how her name is spelt reminds me. Pretty sure she was sold in Canada or something? Not quite remembering but I think she's the one I don't have because of that limited issue. Maybe she was also in the States in some places but there's something funny about her release, I'm sure. Maybe look into that.

I'm no G3 expert but I don't think any of the others are super rare.

Day Lily came with a balloon and Sweet Breeze and there was 1 specific shop chain that sold them over here in NL. In better days that shop had a lot of exclusive G3 stuff comparing to the regular toy shops. So yeah quite limited spread.
And some exclusives were also at UK ponycon assuming they were also sold over there. Snippity Snap is the most difficult to find and highly wanted.

Those slugs are pretty neat. I have one too

Yay for the ficus! And the strawberry! I hope you get some good fruit from it.

Here's my group.

Ponytail palm has three new growth spots!

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Ben is hanging in there.

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The big leaf on the left is new. It grew in a week!

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Lots of new leaves on the African violet

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Here is my Music Blogg.

Silly?

I know!

https://mlpforums.com/blogs/blog/3707-celestias-lunas-music-corner/

Here are my 2 cents again.
About the breezies. The carts have a variety of colours and come random in the sets. The easiest way to keep hem apart are those that belong to the tranceluscent carts and those that belong to the regulare carts set. As for the price, these were easy to find where I live. I just sold breezies to Kyarinakyarikya for €1 each.
The other non cart breezies belong to playsets/ponies. Those were a bit more hard to find.
https://www.strawberryreef.com/Index/BodyType/breezie.html
You could try to combine them with the ponies (if you have them) since they could also be exclusives. Then you can ask a bit more than a few dollars.
The Rarity is from the castle playset and considered common over here. In this case I would check ebay how much she is wanted.
Hope to helped you a bit more. And if others want to add or disagree, please do so. I am mostly speaking from my collecting and thrifting experience