No by its definition niche means a small percentage of the market. The vast majority of modellers do not want a Class XX driven by Bert on 01.01.2000 when the loco had one green panel , a defective light, and Bert wore his red shirt instead of his normal [ 0nly] blue one, they want a Class XX in as near standard condition as possible so that they can make their own special. I once heard Simon Kholer turn down a request from a well known model shop for a special particular to them