How many sewing machines make a collection?

... five, twenty ... 120?

Sewing machine collector with no idea how to sew makes statement about consumerismHarriet Tatham and Zara Margolis, ABC Northwest Qld, 1 March 2017

... being a sewing machine collector who could not sew has resulted in some raised eyebrows. 

"I get some very strange looks from some of my mates down at the pub, but I like the machinery side of it," he said. 

"Every one is different and it's just intriguing" ...