Strange Rear brake conversion on track frame, on a £1,300 quid bike good or bad?

I was looking at a white steel track bike in Hoxton, on Friday. The bike had some sort of metal block bolted onto the frame all owing a Rear break, with cable ties fixing the brake cable. The owner said the shop “14bikeco” said it was illegal for them to sell her the bike without it. She had also paid 1300 quid for the bike! I don’t know what my point is, it’s just seemed wrong on so many levels.

wrong on so many levels... right
so she paid £1300, so obviously going to have good components,
she had a keirin rear brake, which means that it wasn't a custom frame build, otherwise she could have specified for a rear brake bridge
cable ties fixing the rear brake cable to the frame - not exactly uncommon

I don’t know what my point is
, well neither do i really

sorry for the tone, but there you go