diff --git a/.changeset/settle-inbox-price-and-prose-findings.md b/.changeset/settle-inbox-price-and-prose-findings.md
new file mode 100644
index 000000000..8ffe35dca
--- /dev/null
+++ b/.changeset/settle-inbox-price-and-prose-findings.md
@@ -0,0 +1,30 @@
+---
+"catalog": patch
+---
+
+Correct the Power Grid Disruptor price and two doubled words
+
+Power Grid Disruptor carried a stale 99.99 USD. Korneff Audio gives the
+plugin away: its JSON-LD AggregateOffer reads a zero low and high price
+and InStock, and the struck-through 347.99 is a gag anchor on an April
+Fools release the maker kept up. The entry now carries a verified zero
+with source and asOf, which is what separates a giveaway from a price an
+import could not read, so Studio renders "Free" and suppresses the
+purchase link instead of quoting a price nobody can pay
+(catalog-submissions #64).
+
+Four more Korneff prices were re-read at source and confirmed correct as
+they stand, one issue each (catalog-submissions #60, #61, #62 and #63),
+so those close with no edit. Shure Level-Loc is the one worth noting: the
+store shows 79.99 today, but that is display_price, a live sale, against
+a display_regular_price of 149.99. A check reading the JSON-LD alone
+publishes only the sale figure, so it would have "confirmed" the wrong
+number and retired a correct price.
+
+Two doubled words are fixed, "at at 96 khz" and "set at at 15ips". Both
+sit inside wrapped block scalars and neither uses a function word the
+earlier sweeps grepped for, which is why 3.66.0 left them: a line-based
+scan over the raw file cannot see a pair that straddles a wrap, and this
+pass read the parsed YAML values instead. The remaining hits on main are
+the fifteen that sweep already judged correct as written, which stand
+(catalog-submissions #24).
diff --git a/data/content/six-bit-deep-99-kicks.yaml b/data/content/six-bit-deep-99-kicks.yaml
index ddf9fd007..64e1236e9 100644
--- a/data/content/six-bit-deep-99-kicks.yaml
+++ b/data/content/six-bit-deep-99-kicks.yaml
@@ -16,7 +16,7 @@ details: |-
   The process was monitored on adam s3x mastering speakers to ensure low-end
   precision.
 
-  99 kicks with unique character. Wav files at at 96 khz and 44.1khz 24-bit.
+  99 kicks with unique character. Wav files at 96 khz and 44.1khz 24-bit.
   Healthy amounts of headroom (no limiting or unnecessary layering) 100% unique
   source sounds created by the enginners at six bit deep (no sampling)
 specs: |-
diff --git a/data/content/tim-petherick-37j.yaml b/data/content/tim-petherick-37j.yaml
index 9f1486414..a2240e009 100644
--- a/data/content/tim-petherick-37j.yaml
+++ b/data/content/tim-petherick-37j.yaml
@@ -10,7 +10,7 @@ description: "37j by Tim Petherick nebula libraries is soundware (samples or
 details: |-
   37j by Tim Petherick nebula libraries is soundware (samples or presets that load into other products) for macOS and Windows.
 
-  Classic valve tape machine: 4 sample rates. 4 channels sampled set at at 15ips. Special saturation/compression presets with pre-emphasis channel instance and de-emphasis saturation. 2 n3 jpn skins. Hiss wav files.
+  Classic valve tape machine: 4 sample rates. 4 channels sampled set at 15ips. Special saturation/compression presets with pre-emphasis channel instance and de-emphasis saturation. 2 n3 jpn skins. Hiss wav files.
 specs: |-
   - 4 sample rates
   - 4 channels sampled at 15ips
diff --git a/data/software/korneff-audio-power-grid-disruptor.yaml b/data/software/korneff-audio-power-grid-disruptor.yaml
index b410c3487..6e9b7f4a8 100644
--- a/data/software/korneff-audio-power-grid-disruptor.yaml
+++ b/data/software/korneff-audio-power-grid-disruptor.yaml
@@ -19,8 +19,10 @@ platforms:
   - linux
 url: https://korneffaudio.com/product/power-grid-disruptor/
 prices:
-  - amount: 99.99
+  - amount: 0
     currency: USD
+    asOf: 2026-09-19
+    source: official-website
 description: The Power Grid Disruptor is the answer to dull, lifeless mixes.
   Blow up your tracks and the local substation with the latest from Korneff
   Audio!