Price checking a G1 puffy sticker...

[Taffeta]

So today I picked up a bunch of G1 puffy stickers or sticker discs in varying conditions. Most are ones I didn't have, but one of them is Baby Half Note's (it's in good condition, intact but not on it's original backing). I think that was one of the UK release ones not available in the US but I have it already from my childhood so would like to trade it if possible.

I'd ideally like to trade it for one of equal rarity but I wanted to check what a fair match would be for it. What other G1 stickers are in the same rarity/price bracket as this one?

I am not a fussy sticker collector, but I know some people are, so how much not being on the original backing affects the trade value would be helpful too.

Thanks in advance