Install the two buttons

One drag each, once. After this, a Copart page is one click from a filled-in calculator, and a KBB, Carvana or CarMax offer page is one click from landing in your exit price.

Button 1 — on Copart and IAA

Bid Ceiling
Drag this button up to your bookmarks bar — don't click it here

Button 2 — on KBB, Carvana and CarMax

Grab Offer Rate Lots Grab Comps
Drag this one up too — you need both

If you can't see your bookmarks bar

Press Ctrl + Shift + B to show it, drag the button up, then press it again to hide it if you prefer.

Using Bid Ceiling

  1. Open any Copart or IAA vehicle page as you normally would.
  2. Let the page finish loading — the photos need to be on screen.
  3. Click Bid Ceiling in your bookmarks bar.
  4. A new tab opens with the VIN, year, make, model, title, damage and photos already filled in.

Using Rate Lots

  1. Run any Copart search — your usual filters, your usual yards.
  2. Click Rate Lots. Every row gets a green, yellow or red badge, and a panel appears bottom right.
  3. The number on each badge is what is left to fix the car if you won at the current bid and still made your profit. Hover a badge to see the whole sum.
  4. Set your profit, your usual per-car costs and what you really sell at in the panel. Every badge repaints as you type, and the settings are remembered.
  5. Lots Copart gives no retail value for say VALUE IT in blue. Press one badge, or the blue button in the panel to do the whole page, and a small window opens on this site and looks the retail up off real listings for that year, model and mileage. Allow pop-ups for copart.com the first time, or nothing opens.

There is no guess at the repair cost anywhere in it — that is the one thing a search page cannot tell you, so the badge tells you what you have to spend on the repair instead. Non-repairable titles, altered VINs, burns, floods and no-key lots go red whatever the money says.

About the ones with no retail value. Copart genuinely does not publish a figure for some lots — its own record holds nothing for them, so no amount of reading the page will find one. Those are the VALUE IT badges, and the figure they fetch is the same kind of number Copart prints: what an undamaged one retails for, so your rebuilt percentage still does the title discount. A badge rated off a searched figure wears a dashed white ring and says searched retail, so a number off the web never passes for a number off Copart. Each one is a search, so the panel button tells you how many it is about to run; answers are kept for a month and cost nothing the second time. If the search cannot price a car, the badge says so and nothing is invented in its place. Third-party lots — Purple Wave trailers and the like — stay grey: there is no retail value, title or damage code on them to work with.

The lookup has to happen in that separate window because Copart's pages are forbidden from connecting to any other site, this one included.

It reads the page you are already looking at, and follows it as you filter and page. It does not click through to other pages and it does not run on its own.

Using Grab Comps

  1. Open Copart or IAA and search the same model, year and damage as the car you are working out.
  2. Let the results finish loading. Narrow it with their own filters if you want — whatever is on screen is what gets read.
  3. Click Grab Comps. It reads that one page and sends back what those lots carry: retail values, odometers, titles, and any bid standing on them right now.

It reads the page you are already looking at. It does not click through to other pages and it does not run on its own. Sold prices are only included if your own account shows them — Copart keeps those behind a membership tier, and nothing here works around that.

Using Grab Offer

The same button does two jobs, and works out which one you need from what's on the page.

  1. In the calculator, under Instant offers, click Open on KBB, Carvana or CarMax.
  2. On their page, click Grab Offer. It fills in the VIN, mileage and ZIP from the calculator. It does not press their button — asking for an offer in your name is your call.
  3. Answer whatever else they ask until the dollar figure is on screen.
  4. Click Grab Offer again. It shows the figure it found and asks before sending it back.
  5. Repeat for the other two. Your exit price follows the lowest of the three.

It has to stay the same tab

The two tabs talk directly to each other, which is how the VIN gets across without going through anybody's server. So open their site with the Open button in the calculator rather than typing the address yourself — otherwise there's no link between them and it can't fill anything in.

Why it isn't automatic

None of those three publishes a way to ask for an offer — it only exists at the end of their own form. A server pretending to be a browser would work for a few weeks and then quietly start returning stale numbers that still look right, which is the worst thing that can happen to a figure you're bidding against. So it reads the page you're already looking at, only when you click it, and shows you what it found before it counts.

If it grabs the wrong number, hit Cancel and use the pencil on the card to type it in.

What it does and doesn't do

It reads the page already open in front of you, only when you click it. It sends nothing to anyone — the vehicle details travel in the part of the URL after the #, which browsers never transmit to a server.

It reads what's on screen, so let the page load first. If a field comes through blank, type it in — everything stays editable.

Where the button opens

This is already filled in correctly — leave it alone. It is only here for the rare case that you move the calculator somewhere else; changing it rebuilds the button above to point at whatever you type.

Your calculator lives at https://nk-bidceiling.pages.dev/, which is what the box says. If you ever blank it out or paste the wrong thing in, put that address back.
Copy the raw code instead

Make a new bookmark by hand and paste this as the address — Bid Ceiling:

And Rate Lots:

And Grab Comps:

And Grab Offer: