Sims won't rip you off.
They make their money on %. The more they pay you, the more $ they get, as they get a percentage of what you get.



Their workers will scrap stuff down, thats to fill in their time if theres nothing happening.
They will take the time to tell you how to scrap down the metal you did bring in though. Too late for you at the time, but your next load - scrapped down right, will get you more $$.

I don't expect 'over the phone prices' from any yard.