1/2/3Pcs MCP23017 I2C IIC I/O Expansion Board Module 16bit GPIO Extender Breakout Pin Board For Arduino DIY
Quick answer
Is $3.99 a good price for 1/2/3Pcs MCP23017 I2C IIC I/O Expansion Board Module 16bit GPIO…?
It is the usual price, not a deal: $3.99 is in line with the typical price of $4.15 that DipScout measured over the last 11 days. It is the lowest in 11 days, but it has held this price since Nov 3, 2026.
$3.99
Today it costs $3.99 on AliExpress. Since Oct 22, 2026, when we started tracking it, it ranged from $3.99 to $4.19. It's the lowest price in 11 days, but it has been at this value since Nov 3, 2026; by our price history that is already the normal price, not a sale.
No drop compared with what we observed over the last 11 days. The store advertises "was $8.67", but that is the store's own claim; we only state discounts our price history proves.
View on AliExpressThe price above is the last recorded reading, not a live checkout lookup.
Price history
Today$3.99lowest ever seen
Lowest$3.99since Nov 3
Highest$4.19Oct 30 to Nov 3
Tracked since Oct 22 · 2 changesHover over the chart to see each price.Tap the chart to see each price.
See every price change
| When | Price | Change |
|---|---|---|
| Nov 3, 13:13 UTC | $3.99 | −5% |
| Oct 30, 00:04 UTC | $4.19 | +1.0% |
| Oct 22, 15:35 UTC | $4.15 | start |
| Store | Ali-TG104 Consumer Electronics Store |
|---|---|
| Product rating | — |
| Store rating | — |
| AliExpress category | Consumer Electronics › Smart Electronics |
| Recorded readings | 3 |
| First seen | |
| Last reading |
Also sold by 1 other store
Same title and category on AliExpress, cheapest first. Each store has its own price and history; check the variant and shipping.
| Ali-TG104 Consumer Electronics Store | $4.19 · 29 sold |
|---|