Elementary Linear Algebra
Amazon
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DDD Buy Intelligence
15% below its 90-day average ($28.01); 4.5★ across 11 reviews.
✓ DDD VerifiedVerified 57 minutes ago
- Price checked
- Seller checked
- Historical comparison completed
- Product information matched (not yet)
- Availability checked
- Discount claim analyzed
- Current price
- $23.89
- Typical price (90-day avg)
- $28.01
- 30-day average
- $26.06
- Lowest recorded
- Not enough data yet
- Product rating
- 4.5★ · 11 reviews
- Seller
- Amazon marketplace listing
- Availability
- in stock
15% belowDDD True Discount — vs. its 90-day/30-day average
Why this score
| Factor | Points | Evidence |
|---|---|---|
| Historical price | 16.3/25 | 15% below its 90-day average ($28.01) |
| True discount | 11.8/20 | 15% off its typical price |
| Lowest-price proximity | —/15 | No recorded low yet |
| Product quality | 7.1/15 | 4.5★ across 11 reviews |
| Seller trust | 9/10 | Amazon marketplace listing |
| Competitor price | —/5 | No other retailers tracked yet |
| Community | —/5 | No community votes yet |
| Availability | 4/5 | in stock |
High confidence: this score is based on 5 of 8 evidence types (75% of the maximum weight). Missing: lowest-price proximity, competitor price, community. How Deal Score works
no price history chart yet — we record this price daily from now on
Price tracked via Keepa's Amazon price-history data; price and availability are set by Amazon and can change.
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