Overheard staff member talking to customer.
"h, it isn't possible to get those cogs anymore (a freewheel), they aren't made. <ed: well, there are a few shops, such as spa cycles selling them, plus 150 yards away there is a business selling old bike parts>. So you'd need a new wheel. Except that it's really hard to get those size tyres (27), and a modern wheel won't fit in the frame. So you might as well by a new bike.
<Some minutes pass, while customer stands astride a few bikes and picks a Scot, pays for it>.
Customer leaves, and I remark to the shop staff; "The reach on that bike looked a bit long for that guy." Staff "Did it? I wouldn't know, I've never ridden a bike with drops."