Hi,
Thanks for your great mod.
While using Black Market 2 with the Transport Drones mod, I encountered an issue where recipe names starting with "request-" caused calculation problems or script errors.

To ensure compatibility, I added the following exclusion filter:

local function is_excluded_recipe(recipe)
return recipe.name and string.sub(recipe.name, 1, 8) == "request-"
end

And applied this check where appropriate, like so:

if is_excluded_recipe(recipe) then
goto continue
end

This small addition prevents request- recipes from interfering with the price computation and seems to work fine.

I hope this helps improve compatibility for other users as well.
I'm not familiar with GitHub pull requests, so I’m sharing this here directly.
Thanks again for your hard work!