Well, in terms of how others have bought wheel pets, some wheel pets have been 1000+ diamonds.
I wouldn't know how the Evergreen Puff would fare, because I'm not into trading wheel pets (much less specifically that kind of puff). But another comparison that can be made is to however much it goes for in the Eggling Auction.

But say I valued the Evergreen Puff at 1500 diamonds (as far as it being an offer), I'd compare it to buying the Ice Mage Set (450d), Ice Dragon Set (700d), and Ice Familiar Set (600d), totaling 1750 diamonds. If it was valued more/less, that would determine what I buy.

But that's how I compare, not necessarily you, so that's why I'm asking you about the comparisons. But I guess I can't offer more (besides the Aurora Ny'vene from before that I have).

=o that item shop offer is quite tempting and are you willing to offer the nyvene? I am confused on that part.

I'm not sure if I value the spice that much (1500 diamonds or 3 monthly sets). I'd like to see how I fare at the eggling auction. x:

And the Aurora Ny'vene I'm hoping to offer one-for-one (at least until eggling auction is done, then I can offer more gold on it, but it doesn't seem like that helps either apparently).
I still have to see if other people who were once interested in it still wanted to offer their stuff, but also wanted to wait til after eggling auction to recheck for interest.

I see I am messaging a few people about wheel sylestis but the auction would be a good price check though. I do know I need to get a wheel nephini and this wheel puffadore would help me in the job so debating on if this person says yes to trading would most likely determine if i wait till auction is over or not.

I could breed you an SN Lig, CC lig, and RL lig to trade for it! And I could also get you a chocolate fudge lig soon.