Every product has one page: what it is, what it sells for, what it is listed for on eBay now, and what you hold of it. Comps, the eBay finder and a lot's page all link to it.
The Aucta comp, and its price line
The figure at the top, tagged ESTIMATE, is the latest Aucta comp for the product -- the last one anybody on Aucta ran, with its range, how many sales it was built from and the day it was run. Opening the page never spends credits; it shows the comp Aucta already has. "Run comp" runs a fresh one, for a few credits, and shows the sales behind it.
Aucta keeps every comp it makes, so the price line shows the comp over time, one point a day. It is Aucta's own figure only -- never an eBay price.
Buy it now
The same eBay box as Comps and the finder: eBay's listings for the product, each price tagged ASKING, in eBay's order, within the range of the Aucta comp. If you opened the page from a listing in the finder, that listing is pinned at the top so you do not lose it.
Yours
Your lots of this product, with how many are on hand and how many have sold, and the comps you saved on them.
Add to shelf, Plan it
"Add to shelf" opens Add stock with the product's name filled in. "Plan it" opens the next show's plan with your lot of this product picked and the Aucta comp as the price you expect; with no lot or no show yet, it opens Shows.