What is the average price per kilogram for PLA right now?

Across the retailers SpoolIndex indexes, single-spool 1 kg PLA generally trades in a $15–$22/kg range, with budget brands sometimes touching $12/kg in multi-pack deals. Anything below $11/kg for a single spool is almost always either a pricing error, a clearance color, or a very low-trust seller — worth a second look before checkout.

Is a higher MSRP-to-sale-price discount always better?

No. The MSRP is set by the retailer or brand and is not regulated. A 50% discount off an inflated $40 MSRP can still be a worse deal than 15% off a $20 MSRP. Compare actual $/kg across at least two retailers before treating a discount badge as meaningful.

Why do some cheap filament listings rank lower on SpoolIndex than more expensive ones?

Ranking weights $/kg alongside freshness (when the price was last verified), buyability (whether the listing looks like a normal retail offer vs a quote-style or out-of-stock page), and trust signals about the merchant. A very cheap but stale, out-of-stock, or low-trust listing gets deprioritized so it does not crowd out genuinely buyable offers.

How often does SpoolIndex re-check filament prices?

High-tier retailers are re-checked at least every 6 hours; standard-tier retailers every 12; long-tail retailers every 24. Deal pages regenerate at least once a day. The freshness badge on each card shows when that specific offer was last verified — anything older than 48 hours is flagged so you can decide whether to trust it.

Are multi-pack filament deals usually a better value?

Often, but not always. The $/kg on a 3- or 5-pack frequently beats a single spool of the same brand by $1–$3/kg. But pack discounts can mask color or material substitutions — always confirm the pack contains the exact colors and material grade you want. SpoolIndex flags multi-pack listings separately on its deal pages so you can compare like-for-like.

How to Spot a Real Filament Deal (and Avoid Fake Sale Prices)

Inflated MSRPs, stale stock, and “door-buster” single-color drops trick filament buyers every week. A 60-second checklist for telling real deals from theater.

If you shop 3D printing filament regularly, you have probably seen the same trick: a 1 kg spool listed at $34.99, marked down to $18.99, with a red “45% OFF” badge. Two retailers down the page, the identical SKU sits at $17.50 with no badge at all. The discount was never real — the MSRP was inflated to make the price look like a deal. Filament is especially prone to this. Brands ship the same generic spools to dozens of resellers, MSRPs are loosely enforced, and color/material combinations create thousands of near-duplicate listings. A buyer comparing two tabs has almost no chance of catching it. The shortcut is to stop thinking in percent-off and start thinking in dollars per kilogram. Real deals are obvious in $/kg. Fake deals are only obvious in percent-off. Below is the checklist we apply to every offer that lands on a SpoolIndex deal page — you can run it manually in under a minute per listing.

FAQ

What is the average price per kilogram for PLA right now?: Across the retailers SpoolIndex indexes, single-spool 1 kg PLA generally trades in a $15–$22/kg range, with budget brands sometimes touching $12/kg in multi-pack deals. Anything below $11/kg for a single spool is almost always either a pricing error, a clearance color, or a very low-trust seller — worth a second look before checkout.
Is a higher MSRP-to-sale-price discount always better?: No. The MSRP is set by the retailer or brand and is not regulated. A 50% discount off an inflated $40 MSRP can still be a worse deal than 15% off a $20 MSRP. Compare actual $/kg across at least two retailers before treating a discount badge as meaningful.
Why do some cheap filament listings rank lower on SpoolIndex than more expensive ones?: Ranking weights $/kg alongside freshness (when the price was last verified), buyability (whether the listing looks like a normal retail offer vs a quote-style or out-of-stock page), and trust signals about the merchant. A very cheap but stale, out-of-stock, or low-trust listing gets deprioritized so it does not crowd out genuinely buyable offers.
How often does SpoolIndex re-check filament prices?: High-tier retailers are re-checked at least every 6 hours; standard-tier retailers every 12; long-tail retailers every 24. Deal pages regenerate at least once a day. The freshness badge on each card shows when that specific offer was last verified — anything older than 48 hours is flagged so you can decide whether to trust it.
Are multi-pack filament deals usually a better value?: Often, but not always. The $/kg on a 3- or 5-pack frequently beats a single spool of the same brand by $1–$3/kg. But pack discounts can mask color or material substitutions — always confirm the pack contains the exact colors and material grade you want. SpoolIndex flags multi-pack listings separately on its deal pages so you can compare like-for-like.

The good news: you almost never need to run this checklist manually. Every offer on a SpoolIndex deal page — like /deals/best-value-pla or /material/petg — is already normalized to $/kg, filtered for buyability, and ranked by genuine value rather than discount theater. If a listing made it onto a ranked page here, it has already cleared this checklist. The full scoring rubric is documented at /data-methodology. If you ever see an offer ranked in a way that surprises you, that page explains exactly why.

How to Spot a Real Filament Deal (and Avoid Fake Sale Prices)

FAQ

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