Trademark is to create an image for your own brand and form a market share.
The cashbox and duck neck you mentioned are manufacturers and service providers, and their trademarks have been registered and promoted. Like your franchisees, it is their characteristic to promote their own brands.
So if that's all you have, you don't need to register a trademark. Because your registered trademark is not practical. Moreover, the agent itself serves others, and the final recognition of the promotion is also the brand of others. For example, the duck neck you sell will eventually be bought by others, at most by which brand. If you are the only local agent, you can consider registering a service trademark for others to promote. This means: if you want to buy that thing, you have to go to the mall. That's your sign.
Of course, if you want to develop your own stage and form a market share, you should consider registering.