People sometimes bring us products to install that we have on the shelf and would have sold it to them for the same or close to the same price as they got it from at an online store if only they'd asked.
This, in the below mentioned LBS, a guy brought in armfulls of stuff bought online, shop priced up what it would cost to fit everything, as per the pricelist.
He'd been in a couple of weeks previously for a quote for all the stuff, which the shop had done, giving a small discount off RRP, and offering to fit it for free.
Your boy starts complaining that the cost of fitting, plus what he had paid for the parts, was now more than he had been quoted for buying everything from the shop and getting the free fitting.
Owner, who had already made the decision to close, but hadnt pubicised it at that point responds with 'Funny how these things work out, eh?'