A few things at “yes it was 59.99 not 51.49 as per the CRC site.”
I would say that is NOT less than trade price (14%ish off) (Also no mention what it is, as only 14% off I prob say it not Shamino)
So a few things why they ordered it on line,
It is a brand/supplier they don’t deal with so easier to get it in.
Their supplier has nil stock,
P&P/min order levels.
Maybe the part has a “standard” and the only one they get/know it fit.
So instead of saying sorry can’t get that brand/nil stock, it be a xx weeks/we need to put a order together it be xx weeks/do you know what size/length/etc
They just ordered it in to keep you riding ASAP. not bad service to be honest and all for £8.50 that prob does not cover the man hours to order, book in, account paper work etc.