Transparency Verdict
Billion Buick GMC earns a C.
Mixed early signals.
On the small number of verified deals we have so far, we saw some friction on fees or add-ons. Worth comparing other quotes before you commit.
Developing confidence — based on 3 verified out-the-door quotes and 1 tracked negotiation · Sioux Falls, SD
Collected Jul 27, 2026 – Jul 27, 2026 · Updated Aug 17, 2026
The full story
Why Billion Buick GMC earned this grade
Between July 2026 and July 2026, CarEdge negotiated or logged 3 verified deals with this dealership. We pulled the doc fee, the add-ons, and the gap between advertised and out-the-door price from each one. Then we graded them the way a friend in the business would: on the things that actually cost you money.
✓ What they do well
1 thingDoc fee is genuinely reasonable
$180 is $103 below the SD average of $283. That's money you keep — most dealers in their market charge more.
! Where to push back
2 thingsMandatory add-ons show up on most deals
33% of quotes include add-ons presented as non-negotiable, averaging $949. Expect them to try to include something — paint protection, nitrogen-filled tires, VIN etching.
TipAsk which items are genuinely required and which are dealer-added. Anything not required by the manufacturer or the state is worth pushing on.
Listing price and real price disagree
Quoted prices run 9.3% above the advertised listing — roughly $3,255 extra on a $35k vehicle. That's a pattern, not a rounding error.
TipThis dealer's listing price is a marketing number, not a real one. Don't anchor to it — anchor to an out-the-door target.
3 verified OTD quotes from Billion Buick GMC
Real out-the-door worksheets, not reviews. Click “View Quote” on any row to see the price breakdown.
Recent Quotes
Verified out-the-door prices from real transactions
2 vehicle transactions — 3 individual quotes
Most Common Add-ons
At a Glance
Tips for Billion Buick GMC
- Dealer markup is 9% above listing (excluding taxes). Ask for an itemized breakdown — doc fees and add-ons may be negotiable.
- Minor add-ons (~$316) may appear. Ask what's included and if they can be removed.
- Doc fee ($180) is at or below national average. One less thing to negotiate.
- Limited data (3 quotes). Score may change as we collect more information.
Keep researching
Look up another dealer by name, brand, city, or zip.
On the lot right now
Separate from the grade above — this is what's currently listed. Useful for spotting aging stock with room to negotiate.
Current Inventory
View all 473 vehicles →$55,999
Median Price
66
Median Days Listed
30
Added This Week
Days on Market
How long vehicles have been listed. Older stock means more room to negotiate.
Nearby Rated Dealers
These dealers near Sioux Falls have transparency scores based on verified pricing data.
Frequently Asked Questions
What fees does Billion Buick GMC charge?
Based on 3 verified out-the-door quotes collected by CarEdge, Billion Buick GMC charges a $180 documentation fee and averages $316 in dealer add-ons when present. Billion Buick GMC earns Transparency Grade C (78/100).
What is Billion Buick GMC's doc fee?
Billion Buick GMC charges a typical documentation fee of $180. The SD average is $283. This is based on 3 verified OTD quotes in our database.
Does Billion Buick GMC add mandatory add-ons?
Billion Buick GMC adds an average of $316 in dealer add-ons when present. Ask for an itemized breakdown and negotiate to remove non-essential items like paint protection, nitrogen tire fill, or VIN etching.
Is Billion Buick GMC a good dealer?
Billion Buick GMC has a transparency score of 78/100, earning a Grade C. This score is based on their doc fees, add-on behavior, dealer markup, and data quality from 3 verified OTD quotes. This is an average score. Compare with nearby dealers before making a decision.
Explore Buick and South Dakota dealer data
How we know this
Every number on this page came from a real deal.
Most dealer review sites scrape star ratings and count angry posts. We do the opposite. CarEdge shops for cars alongside thousands of real buyers every week — and when we negotiate on their behalf, we capture the full out-the-door breakdown the dealer sends back.
For Billion Buick GMC in Sioux Falls, SD, that has meant 3 verified OTD quotes across 1 negotiated deals logged into our database. Each one is a PDF, an email, or a screenshot showing the actual doc fee, the actual add-ons, and the actual final price — not a salesperson's promise.
Fee Transparency
30%Is the doc fee reasonable, or is it just profit? We compare it against the state average — and the legal cap, where one exists.
Add-on Behavior
30%How often does the dealer stick you with mandatory add-ons like paint protection or theft deterrent — the kind you can't say no to? Add-ons the dealer discloses as optional don't count against them.
Price Accuracy
30%Does the advertised listing price match what you'd actually sign for? We flag dealers whose out-the-door diverges from the listing.
Data Quality
10%More data = more trustworthy grade. Dealers with lots of recent, complete quotes score higher for consistency.
The four numbers behind the grade
Weighted ScoreThe raw component scores — the math that led to C.
Doc Fee Comparison
Pulled 3 quote records · Grades update as new data comes in · Dealers cannot pay to change their score.
Don't face this dealer alone
Let us negotiate for you. We push for the out-the-door price in writing, strip junk fees and add-ons, and you only approve the final offer.
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