I reinstalled HonorBuddy. The error persists.
It is also pricing some items incorrectly (some items that were broken previous install are now fixed, but others that were working fine are now broken). One example below:
<!--Mounts-->
<!--Vial of the Sands-->
<SellItemOnAhAction Category="Miscellaneous" SubCategoryType="WoWItemMiscClass" SubCategory="Mount" UseCategory="True" RunTime="_12_Hours" AmountType="Amount" ItemID="65891" MinBuyout="20000g0s0c" MaxBuyout="45000g0s0c" StackSize="1" IgnoreStackSizeBelow="1" Amount="1" BidPrecent="100" UndercutPrecent="0.001" AutoFindAh="True" PostIfBelowMinBuyout="False" Location="0, 0, 0" />
<!--Reins of the Crimson Deathcharger-->
<SellItemOnAhAction Category="Miscellaneous" SubCategoryType="WoWItemMiscClass" SubCategory="Mount" UseCategory="True" RunTime="_12_Hours" AmountType="Amount" ItemID="52200" MinBuyout="50000g0s0c" MaxBuyout="125000g0s0c" StackSize="1" IgnoreStackSizeBelow="1" Amount="1" BidPrecent="100" UndercutPrecent="0.001" AutoFindAh="True" PostIfBelowMinBuyout="False" Location="0, 0, 0" />
Vial of the Sands undercuts properly given these settings.
Reins of the Crimson Deathcharger, however, does not: Instead of undercutting a 75k competition to a slightly lower price it is posting mine @ 45000g which is out of wack...it's set to NOT post if below minimum buyout and the set min buyout is 50k

...is the error in the profile? Because I doubt it is.
Part of the log:
PB 1.471: Selling Name:Reins of the Crimson Deathcharger Buyout:45000g0s0c Competitor:78998g0s0c
PB 1.471: Skipping Vial of the Sands since 1 items from me are already posted. Max amount is 1
PB 1.471: Skipping Vial of the Sands since lowest buyout:29998g99s99c is below MinBuyout:50000g0s0c
PB 1.471: Skipping Fortune Cookie since 10 items from me are already posted. Max amount is 10
PB 1.471: Skipping Severed Sagefish Head since 10 items from me are already posted. Max amount is 10
PB 1.471: Skipping Savory Deviate Delight since 15 items from me are already posted. Max amount is 15
PB 1.471: Skipping Handful of Obsidium Bolts since lowest buyout:3g78s0c is below MinBuyout:5g0s0c
PB 1.471: Skipping Obsidium Skeleton Key since 5 items from me are already posted. Max amount is 5
Err: If Condition: ((bool)var1) || (HasNewMail || MailCount> 0)
Err:System.InvalidCastException: Specified cast is not valid.
at CodeDriver.Code1651054075(Object context)
at HighVoltz.Composites.If.CanRun(Object context) in c:\Program Files\HonorBuddy\Bots\ProfessionBuddy\Composites\If.cs:line 206