What was the lowest Amazon price in the 90 days before this check?

$7.50. At our check on Sep 30, 2026, the price was $7.50.

What does the “typical” price on this page mean?

It is the time-weighted average of Amazon’s own price over the 90 days before our check: $18.78. The median was $14.54. A short price spike pulls the average up, so the median is the better guide for this item.

How often does the price change?

Amazon changed it 20 times in the 90 days before our check, about 6.7 times a month.

Is this still the price today?

Not necessarily. We recorded $7.50 on Sep 30, 2026. Amazon sets the current price, which the listing and checkout show.

Past check

Originally checked Sep 30, 2026, 4:39 AM PDT

Archived verification record

Drill America 21.50mm Reduced Shank High Speed Steel Drill

Drill America

Researched variant · DWDRSD21.5MM · 21.50mm · 3-Flat

Photo from the Amazon listing

Research receiptASIN B01BKTNMWMArchived check

Direct answer

Was this a good price?

At Sep 30, 2026, 4:39 AM PDT, yes. This exact variant passed our privately measured price-history threshold. That verification window has expired, so this page does not claim the current offer is still a deal.

$750

Usual $14.54 · 90-day average $18.78

48% below usual

The average is inflated by a short price spike.

Lowest price in 90 days

Price checked Sep 30, 4:39 AM PDT

Tracked below its usual 90-day Amazon price in Tools & Home Improvement.

See current listing on AmazonSee on Amazon

As an Amazon Associate I earn from qualifying purchases. Amazon sets the price and availability you see after clicking.

90-day price history

Amazon price
Typical $18.78
Low $7.50

Amazon price over the 90 days before our check: high $28.85, low $7.50, typical $18.78, $7.50 when checked.

Read the chart

What the 90-day history shows

At our check on Sep 30, 2026, Amazon’s own price was $7.50. In the 90 days before that, it ranged from $7.50 to $28.85.
The time-weighted average (the “typical” price) was $18.78; the median, the price it sat at or below half the time, was $14.54.
It was at or below $7.50 for 1 day of the 90 days Amazon listed a price.
It had been at or below this price since Sep 29, 2026. Before that, it was not this low at any other point in the window.
Amazon changed the price 20 times in that window, about 6.7 times a month.

Check the “typical” price. A short price spike inflates the average. The price peaked at $28.85 and sat at double the median or more for about less than a day, which lifts the 90-day average to $18.78 even though the item usually sold near $14.54. Against the median, the checked price is 48% lower, not the 60% the average suggests.

Rule-based answer

Was it a good time to buy?

Yes. At our check this was one of the best prices in the last 90 days.

It matched or beat every Amazon price in the 90 days before the check.
It was at or below this price for only 1 day of 90.
It was 48% below its median price of $14.54.
The “typical” price is inflated by a short spike (see the history notes), so the headline discount overstates the saving.

This check has expired, so treat it as history, not today’s price.

Evidence sheet

What cleared the gate?

The exact ASIN and variant matched the research receipt.
The offer beat our private recent-history threshold at the timestamp above.
The evidence was fresh when this check was approved.
A human approved the product and wording before publication.

Before checkout

What should you check now?

Confirm the size, color, seller, shipping and current total on Amazon before buying.

For Tools & Home Improvement, also confirm on the listing:

Tool-only vs. kit: whether batteries and a charger are included in this price.
Battery platform and voltage, if you already own tools from this brand.
Who honors the warranty, and the return window for the seller shown at checkout.

Amazon’s checkout total—not this page—is the current source of truth.