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

$4.03. At our check on Oct 16, 2026, the price was $7.75.

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: $18.37. The median was $8.61. 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 38 times in the 90 days before our check, about 12.7 times a month.

Is this still the price today?

Not necessarily. We recorded $7.75 on Oct 16, 2026. Amazon sets the current price, which the listing and checkout show.

Past check

Originally checked Oct 16, 2026, 5:07 AM PDT

Archived verification record

iRobot Roomba Authentic Replacement Parts - Roomba 800

iRobot

Researched variant · 4636433 · 3 Count (Pack of 1) · White

Photo from the Amazon listing

Research receiptASIN B07L4FYWSLArchived check

Direct answer

Was this a good price?

At Oct 16, 2026, 5:07 AM PDT, it passed our gate, but the real saving is small. See the history notes below for why. 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.

$775

Usual $8.61 · 90-day average $18.37

10% below usual

The average is inflated by a short price spike.

Price checked Oct 16, 5:07 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 $18.37
Low $4.03

Amazon price over the 90 days before our check: high $35.99, low $4.03, typical $18.37, $7.75 when checked.

Read the chart

What the 90-day history shows

At our check on Oct 16, 2026, Amazon’s own price was $7.75. In the 90 days before that, it ranged from $4.03 to $35.99.
The time-weighted average (the “typical” price) was $18.37; the median, the price it sat at or below half the time, was $8.61.
It was at or below $7.75 for 45 days of the 90 days Amazon listed a price.
It had been at or below this price since Oct 13, 2026. Before that, the last time it was this low was Oct 13, 2026.
Amazon changed the price 38 times in that window, about 12.7 times a month.

Check the “typical” price. A short price spike inflates the average. The price peaked at $35.99 and sat at double the median or more for about 39 days, which lifts the 90-day average to $18.37 even though the item usually sold near $8.61. Against the median, the checked price is 10% lower, not the 58% the average suggests.

Rule-based answer

Was it a good time to buy?

Not a standout. The checked price is close to what it usually sells for.

It has been cheaper: the 90-day low was $4.03.
It was only 10% below its median price of $8.61.
The “typical” price is inflated by a short spike (see the history notes), so the headline discount overstates the saving.
The price moves often (about 12.7 changes a month), so it may change again soon in either direction.

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:

Size, fit, or compatibility with what you already own, as the listing states it.
What is included at this price (pieces, accessories, hardware).
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.