Not to justify their prices, but
If they would have bought it, installed it, marked it up a bit, etc. and 561 miles down the road, the cam snapped, would you expect them to replace everything for free, including other stuff that was broken?
Where would that cost be covered in their business "model"?
When I used to work for a large company that did some work, less than $2 billion a year, with the US and foreign military, I saw some of the contracts that came through. Every contract had "base" amounts that were charged. For example $50 to route the contract for review to all required departments, $250 for legal to review the contract, $100 for the military specification person to review any changes or exceptions or odd specifications called out in the contract, $100 (IIRC) for the required packaging and copies of all specifications, work orders, etc. that had to be submitted with the contract, and it went on and on, minimum charges associated with a contract. Now sometimes the contract was for $250,000,000 of a product spread over 5 years. Sometimes it was for the proverbial 1 specific bolt, or electrical component, or whatever. But when the Government submitted a 230 page contract to supply 1 bolt, it was NOT Home Depot time, and that is the type of item that showed up "PENTAGON SPENDS $1200 FOR A BOLT